’18 Late Model Rules

These rules have been written with three goals in mind; promote safety, ensure fair competition and help control costs. No set of rules can encompass all eventualities so there will be times when officials and drivers will have to work together to find an appropriate response to unforeseen developments. Flamboro Speedway officials reserve the right to amend any rule with prior (fair) notice to competitors. Regardless of all else, Flamboro Speedway officials will be the final authorities in interpretation and application of these rules and the equipment used to enforce these rules.
Cars with frequent or multiple compliance problems may be considered evidence of intentional cheating. In that case the Tech Director will determine if a penalty is in order.
Cars found non-compliant post-race could be subject to penalties up to and including disqualification.
Tech inspection centers on the pre-race formal check; however, the car is subject to inspection at any time from the start to finish of a race meet. Although the pre-race check often focuses on a specific theme at each meet to ensure all items get checked in the course of a season, there is no restriction on what is checked on a given car, nor is it required that the same item be checked on every car. The same is true of post-race inspections.
SAFETY will continue to be our number one priority – i.e. belts, fuel cell, on track. We will be working to ensure safety continues to be a non-issue.

Safety: In the pits and on the track takes precedence over all else.

Pit Safety: In the pits, safety will be greatly enhanced by attention to the basics including the wearing of protective clothing and eye wear at appropriate times; fire safety practices and the presence of a class “ABC” fire extinguisher; proper storage and disposal of flammables, chemicals and wastes, elimination of distractions and horse play and safe working practices such as the use of jack stands.

Driver Protection: Drivers are required to wear full coverage; one or two piece Nomex multi-layered fire suits which are S.F.I. rated. Fire retardant undergarments are mandatory with a single-layered suit. Fire retardant gloves and shoes are mandatory. Driver helmets must be full face and conform to Snell SA-2010 or higher SA standards and have a certification sticker visible inside the helmet.

Head and Shoulder Restraint Seat: Approved head and neck restraint system which meets SFI specification is mandatory

Belts and Harness: A quick-release 5-point belt (shoulder and lap) of no less than 2″ in width, and 2″ width anti-submarine harness in good condition are mandatory. Shoulder harnesses must be mounted and secured at the driver’s shoulder height. Belts must be securely fastened to the frame, cross-member or roll cage by means of a suitable reinforced mounting, in such a manner that all fittings are in direct line with the direction of pull. No inertia reels allowed and under no circumstances are bolts inserted through belt webbing accepted for mounting. Belts may not be any older than 3 years (manufacturer’s date). All belts and mounting will be subject to inspection.

Fire control: Cars are recommended to have an on board fire system. On- board fire systems should be a 5 LB system and spray into driver’s compartment. All entries must at least have a CSA approved fire extinguisher “ABC” rating, dated for the current year, which accompanies the car at all times. Fire Extinguishers, whether a suppression system or a stand- alone extinguisher, must be mounted in such a manner so the gauge is visible when looking in from outside the car.

Window Net: An approved nylon ribbon type net must be installed in driver’s side window opening. Net sizing must be at least 16″ x 18″ . Net must be installed so it is tight. Window net anchors must be attached to roll bars, not body. Window net must be quick-release type. Net must be permanently anchored at the bottom and release at the top. Lever-latch releases are highly recommended.

Dash: Car must have a fabricated full dash from left to right. All gauges must be installed directly in front of driver and on a vertical plane of dash. No part of dash shall continue to floor panel.

Steering Wheel: All cars must be equipped with a quick release steering wheel. Center of the wheel must be padded. Collapsible column highly recommended.

Roll Bar Padding: All roll bars within driver’s area must be covered with approved roll bar padding. No sharp edges, intrusions or bare metal near driver.

Seat: Approved aluminum racing seat mandatory. Aluminum seats must be bolted or secured solid, so that seat will not shift or loosen on impact. A minimum 6 seat bolts, min. 3/8 inch or larger will anchor the seat. Seat must be completely to the left of the center line of the car and inside frame.
Sheet metal surrounding driver must be 22-gauge magnetic steel, including front firewall. Interior must be complete with no visible holes.

Two way radios allowed
Track one way frequency 454 UHF.

Filter element diameter 14″ maximum, height maximum 4-1/2″ .
All air shall be filtered through element. Top of air cleaner must be solid, no holes.
Element may not be sprayed or soaked with any type of chemicals or liquids.
Cowl induction will be acceptable, the front of the cowl must seal to the back of the hood when the hood closes. A rectangular opening maximum 20 inches long by 3 inches wide may be removed from the sheet metal at the center of the cowl.
No forward mounted air ducting allowed.
Air cleaner base must mount directly to carb, a thin gasket will be allowed.
NO high velocity or stack type air cleaner assembly.
Air cleaner must fit under hood without raising or distorting hood contour.
No high performance air flow enhancing air cleaners allowed.

Must be anchored securely and separated from driver by a firewall. Minimum two 5/16″ mounting bolts.
12 VOLT electrical system only


ABC Body 103.5″ minimum wheelbase. All vehicles will conform to the ABC body nose centerline template or car will require a weight penalty. Tolerance of 1/2″ .

ABC website
Cars must conform to the following minimum and maximum heights.
B Front Overhang (center of hub to front edge of bumper). Maximum 46″
C Side Window Opening Minimum 14″
E Bumper/Rocker Panel Clearance Minimum 4″
G Rear Overhang (center of rear hub to rear bumper Maximum 52″
H Roof Height (measured in center, 10″ back from edge) Minimum 46″
I Door Height (measured at front of door, A posts) Minimum 32″
J Door Height (at rear of door) Minimum 33″
P Bumper Cover Height (measured at base of spoiler at center) Maximum 35″
AP “Muscle Car” bodies allowed.
No carbon fiber components.
All body panels and windows must be mounted and properly braced on the chassis to prevent deflection under racing conditions.
Roof must be mounted to conform to template and exhibit no side-to-side rake. The placement of the roof will be compared to the location of the spoiler using an “X” measurement from the top corners of the windshield to the outside edges of the spoiler.
Rear deck must not be dished or raked side to side.
A 6.5″ high X 60″ wide rear spoiler, (measured across rear) with no side boxing is allowed. All rear spoilers will be centered side to side on the rear deck. Rear spoiler must be clear Lexan.
Lexan windshield with a minimum thickness of 1/8″ must be full and complete. No holes or ducting allowed. One brace from top to bottom must be on inside center of windshield. The car must run a rear window (minimum thickness of .093″ ) and it too must be braced on the inside only. The passenger side window must remain completely open except for front 10.5″ , which may have an air vent or clear Lexan installed (must match shape and dimensions of Five Star part # 000 – 6202). No additional material may be added in pillar area. The quarter windows should be Lexan. However, should the original fiberglass remain, the intended opening should be made to look like a window. Top 4 inches of windshield is reserved for series sponsor decals.
3″ X 14″ mirror mounted in the stock location is permitted. In addition to the larger mirror, an optional left side mirror that is no larger than 4″ may be installed. The left side mirror may not extend or protrude outside the vehicle.
Numbers must be on the roof, readable from the right side of the car and both doors, at least 18″ high and 3″ wide. All numbers must be dark on a light background, or light on a dark background. No gold, silver, metal flake or trick numbers. A number must be placed on the front of the car, below the left headlight cover.
Race cars must be presentable in appearance at all times. Cars that are considered improperly prepared may be rejected by Flamboro Speedway officials.

Functional four-wheel brakes with a working caliper on each wheel are mandatory. Calipers may be made of steel, cast iron, or aluminum only.
Maximum four pistons per caliper. Maximum one caliper per wheel.
Magnetic steel brake rotors only. No cast iron faced aluminum. No carbon fiber material is allowed.
Front brake rotors must be a minimum of 1 ¼-inch thick and made of magnetic steel.
Rear brake rotors must be a minimum of ¾-inch think and made of magnetic steel.
No holes allowed in brake rotor and pad surface.
No floating rotors allowed.
All cooling ducts must be routed from the front nose of vehicle. Two hoses per brake, with a maximum 3″ flexible hose to the brake.
Electronic wheel speed sensors or brake activators will not be permitted. An on-board pressure adjustor is allowed.
Front Clip: Approved front fabricated frame sections. Conventional late model strut type front fabricated frame sections or Fabricated (tube clip with 1971 to 1981 Camaro lower pickup points are allowed).
Underslung-style chassis, Perimeter chassis, Straight rail, Coil-over permitted.
Front clip and main frame 2″ x 3″ x .095″ minimum.
Chassis width 48″ Min outside rail to outside rail.
Rear clip 2″ x 3″ x .083″ minimum.
Four-point roll cage 1-3/4″ x .090″ DOM minimum.
Minimum cage height 39″ from the bottom of the rail to the top of the cage.
Minimum four left-side horizontal door bars. Minimum height 22″ to bottom of frame.
Minimum length for door bars 39″ center to center. Door bars to be plated with minimum 16 gauge metal.
Width of halo to be no less than 28″ outside to outside. Length of halo to be 28″ minimum.
Leg protection bar mandatory. Roll cage structure shall be braced to front frame stub with a hoop section surrounding the engine compartment, and rearward with diagonal members connecting to rear frame section.
Driver to be protected from left-rear trailing arm intrusion by 1/8″ plate, 12″ x 12″.Towing Loops: Each rear frame rail must have a 3″ inside diameter tow loop (strong enough to lift the car) securely fastened as far rearward as possible extending above the trunk floor.

Front Upper Control Arms: Any tubular Upper Control Arms. Magnetic steel only.
Lower Front Control Arms: O.E.M. type or approved tubular steel aftermarket control arms accepted. All control arms and mounting hardware must be magnetic steel.
Rear Control Arms: Must be maximum of 30″ from mounting hole center to mounting hole center. Steel solid rod ends, rubber bushing style or magnetic steel Heim ends allowed. No hydraulic or spring devices allowed.
Upper Rear End Link: Maximum length 30″ mounting hole center to mounting hole center. No coil, spring or hydraulic device allowed. Magnetic steel Heim ends allowed.
No “BIRD CAGE” Assembly permitted in the rear suspension. Trailing arms must mount to rear end in a solid fashion (magnetic steel heim allowed) and no part of the trailing arm mounting may freely rotate around the rear end housing.
Springs: Aftermarket coils permitted front & rear. Non-metallic spring spacers are allowed between coil windings. Magnetic steel springs only.
Sway Bars/Panhard Bar: Max Sway bar size 2 inch. Sway bars and panhard bars front and rear are optional and may be equipped with magnetic steel Heim-ends at the connecting points.
Shocks: The following shocks will be permitted for competition.
Any steel bodied gas race shock with a retail price no greater than $200.00 CDN.
The QA1 62 series, and aluminum threaded body, NON- adjustable shock will also be permitted for competition.
The only adjustable shock permitted is the Pro Shocks rebound only adjustable smooth and threaded body shocks. PART # “PROAC” or “PROA”
1 shock per corner and no high pressure gas shocks.
Bump stops: External bump stops will be allowed
Steering and Hubs: Steering components, steering box and spindles must be magnetic steel (NO ALUMINUM SPINDLES ALLOWED). Magnetic steel Steering arms only. Hubs with a 5 x 5 bolt pattern. Wide five hub optional. Stock or aftermarket. Rack and pinion steering allowed. MAGNETIC Steel Heim ends must be used for tie rods (5/8-inch minimum).
ALL Steering/Suspension mounting hardware must be magnetic steel. NO TITANIUM.

Wheel stud threads must protrude through nuts.
Bleeder or pop-off valve devices are not permitted.
No Blowers or hoses will be allowed to blow air on the tire/wheel
Wheel rim: Rim size 15″ x 10″ . Wheel rims must be magnetic steel only.
Wheel rims must be identified with team # on ALL wheel rims.
No soaking or altering of tire in any manor allowed. Drivers/teams soaking or altering tires will receive major penalties.
All tires MUST be purchased at approved tire vendor. American Racer EC21-10 Tires available at Grisdale Racing Products. 1 800 561-1791
Tire limit rule- 6 tires to start year, all tire numbers must be submitted before any race. One tire per week limit.
103.5″ inch wheelbase minimum.
Wheelbase must not exceed 1/2″ from side to side.
Track width: 80.5″ in maximum measured from outside to outside of tire sidewall measured at spindle height.
Radiator must remain stock in appearance and remain in standard position.
Radiator dust screens permitted.
Radiator must include liquid over flow can (minimum capacity 1 liter) mounted ahead of engine firewall. Over flow vent must exit the vehicle at the base of the windshield.
Fan shroud cannot extend more than 1 behind blades.
No anti-freeze allowed in the cooling system.

Triple or Twin disc of a 5.5 inch minimum diameter and flex plate or a twin disc of minimum 7.25 inch diameter.
All cars must have magnetic steel or aluminum bell housing. Starter motor must be in stock location.
If using stock-type flywheel & clutch assembly, a shatter-proof bell housing must be used
No carbon fiber or extensively modified units.

Transmission must remain stock appearing O.E.M. 4 speed with all forward gears working as originally produced. No less than 123 third gear ratio
Must have reverse gear.
Must retain brass synchronizer ring.
Two-speed oval track Richmond transmissions allowed (T-10 case) or Winters 60200 “Raptor” transmission. No less than 123 ratio
No Automatic transmissions permitted
Shifter: Conventional-type shifter or rods. Shifter must have boot or cover at all times. Shifter boot must have a wire wrap sealing the top of the boot to the shifter.
Mandatory transponder mounted 172″ or more from the front leading edge of the bumper.
Rear axle ring and pinion may be of any gear ratio. Full floating quick-change or 9 inch permitted.
Rear differential housing must be centered in car. Aftermarket spools are permitted. No cambered rear axle assemblies allowed. No limited slip or posi-traction devices permitted.Magnetic steel axle shaft assemblies only. Aluminum axle tubes are allowed.
Matching white lines are to be painted on each hub to indicate the relationship of one axle to the other. These lines are to be positioned so that they are lined up exactly the same on each side – i.e. both lines would run from the 3 to the 9 o‘clock position.

Drive shaft and universal must be similar to stock type.
Steel, 360-degree retainer loops, minimum 1/4″ thick by 2″ wide, must be positioned at front and rear of shaft, within 12″ of each U-jount.
No aluminum or carbon fibre drive shafts.
Magnetic steel drive shaft must be painted white.

Cars will not be permitted to carry on board computers, micro-controlers, processors, recording devices, electronic memory chips, traction control devices or digital read out gauges.
Violators will be suspended.

Any tampering, alterations, or violations with respect to the ignition box and related components will result in the immediate suspension of the driver, car owner, and chief mechanic for a minimum of 1 year (365 days) from the date of the infraction. Further monetary fines and reduction of points will be assessed by series official.
Car must be self-starting & must have a master disconnect switch mounted in center of the car.
All cars must have MSD 6AL or 6ALN, MSD 6425 – Digital 6AL Ignition Control or Crane Cams Ignition part # 6000-6701 mounted on the right side of the dash within 6″ (six inches) of the ‘A” post.
The operational rev chip must be accessible through the passenger window all ignition wiring to remain open and clearly visible for inspection. Crate engines must have an operational 6400 RPM rev chip installed. The MSD 6425 Digital 6AL ignition module and the Crane Cams Ignition part # 6000-6701 ignition module must be set to correct RPM rating for engine package.
Stock-type distributor & module for make and model or GM HEI-type distributor from DUI optional or stock type MSD distributor. Only one (1) ignition box, one coil, and one wiring harness per vehicle. No other electrical devices are allowed anywhere on the vehicle.
All ignition wiring to remain open for inspection. All wiring must use weather pack connector 6 and 2 pin at ignition box, and 2 pin at the distributor. Male connectors are required on the box and distributor. 4 pin connector required and must be accessible on the rear of the tachometer See notes below:
All 6 AL wiring to be standard:
Red wire/ ignition switch
Use a brown wire/ tach output
Black wire/ coil negative
Orange wire/ coil positive
Green wire/ dist. Negative
Purple wire/ dist. Positive
Connectors to be within 12 inches of the ignition box.
Battery pos. and neg. may be hard wired to master disconnect and chassis ground.

Fuel cell mandatory.
22 U.S. gallons maximum size allowed.
Fuel cell must be mounted in trunk area behind area behind firewall, between the frame rails.
The fuel cell and or cell guard will be no lower than 8″ from the ground while at frame height.
Fuel cell must be complete with safety flap foam and check vent assembly vented to outside if the car.
A minimum of 22 gauge steel or aluminum fuel cell case.
Dry break system allowed. If used, filler system to be located on the left rear quarter panel behind rear wheel FIRMLY supported from within.
Filler cap assemblies must be grounded to the chassis for the prevention of static build up.

Must be single AN-8 Max Armored/Kevlar hose.
If fuel line is routed through cab it must run through a steel tube and painted either yellow or red in contrast to car color. The conduit must extend minimum 2″ beyond each firewall.
The conduit in the car in addition to being painted in the contrasting color will also be labeled” Fuel line, Do Not Cut”. Fuel shut off valve mounted in fuel line, must be accessible to be shut off by driver or safety personnel.
No icing, Freon type chemicals or refrigerants may be used in or near the fuel system or engine compartment. No cooling of fuel cell or fuel system.

The gasoline shall not be blended with alcohols, ethers, or other oxygenates and it shall not be blended with aniline or its derivatives, nitro compounds or other nitrogen containing compounds. Fuel Pump: Mechanical pump only
Fuel samples may be taken at any point during racing event.

Crate engines: Must use Holley #80541-1. Carb must be unaltered & pass “go-no-go” test. Maximum gasket thickness is .065″ . 602 crate engine allowed carb spacer (See 602 Engine Package).

*D347SR/SR7 engine must be equipped with a one piece, 4 hole, 1″ thick, adjustable base plate produced by Allstar Performance PN# ALL26060 equipped with four 1.250″ base plate inserts PN# ALL26066 produced by Allstar performance.

Built engines: Must use R4412-500 C.F.M. Holley factory stock produced two barrel carburetor only. Carb must pass go-no-go tests. 1 carburetor spacer with maximum .065″ gaskets on either side

No screens allowed in and or under the carburetor.
No altering of the intake manifold with respect to the fuel atomization is allowed.
Any attempt to pull outside air other than down through venturi’s is not permitted.
Mandatory two throttle return springs in opposite directions.

Headers: Maximum primary tube size of 1 3/4″ and maximum 3″ collector allowed. Tri- Y headers allowed. Magnetic steel only (No Stainless).
Schoenfield part #SCH135VHCM-3 crate-engine headers with 1 5/8″ OD to 1 3/4″ OD with a 3″ OD collector. 25 lbs weight break. Headers 1 5/8″ OD to 3″ OD collector for built motor. 25 lbs weight break.
Only 1 maximum 3″ balance tube between the right and left header system is allowed.
Exhaust must exit right side of car. Pipes to be cut flush to the body and above the frame rail.
MUFFLERS: mufflers must be removable for inspection, and must remain unaltered in appearance. A decibel reading of 95db or less at 100 feet will be enforced.

604 CRATE minimum weight 2775 lbs.
Ford 347 Sealed Crate Engine
Part # M-6007-D347SR minimum weight 2775 lbs.
Ford 351 Sealed Crate Engine
Part # M-6007-2351SR minimum weight 2775 lbs.
602 CRATE minimum weight 2625 lbs.
603 CRATE stock minimum weight 2750 lbs.
Built Engine minimum weight 2750 lbs. Maximum 57% left side.
Maximum 50% rear.
After any race or qualifying, with driver in seat with helmet and belts on.
Straight Rail Chassis: 15 lbs. mounted to right front frame rail.
Engine setback: 1/2″ – 4″ 15 lbs. added to minimum weight.
Schoenfield part #SCH135VHCM-3 crate-engine headers with 1 5/8″ OD to 1 3/4″ OD with a 3″ OD collector. 25 lbs weight break.
Headers 1 5/8″ OD to 3″ OD collector for built motor. 25 lbs weight break.

Weight must be no lower than frame rails and in block form, no less than 10 lb. pieces.
No weight to be added rearward of fuel cell.
All ballast weight must be either fastened to or encased within the frame rail.
All added weight must be double bolted and painted white, with car number clearly marked on each piece.
If stacked or bolted weight exceeds 30 lbs it must be bolted into an approved weight tray.
Engine must be located where the front most spark plug must be centered or ahead of the upper ball joint. 1/2″ – 4″ setback allowed with 15 lbs. added to minimum weight.
Engine minimum height 11″ measured at crankshaft center line.
No ride height rule. Chassis can not bottom out on the track causing sparks. Body roof height must be 46″ or more measured 10″ back from windshield.
Any tampering, alterations, or violations with respect to the crate engine program will result in the immediate suspension of the driver, car owner, and chief mechanic for a minimum of 1 year (365 days) from the date of the infraction. Further monetary fines and reduction of points will be assessed by the technical committee. The tampered engine which must be removed at the team’s expense will be impounded at both the team’s expense and risk until the ruling is finalized.


GM 604 Crate Engine: Part # 88958604
Ford 347 Sealed Crate Engine Part # M-6007-D347SR
Ford 351 Sealed Crate Engine Part # M-6007-2351SR
GM 602 Crate Engine: Part # 889586602/19258602 with following changes.
Double Roller Timing Chain.
6-3/4″ magnetic steel, non-fluid balancer.
7″ or 6 1/2″ deep oil pan, kick-out allowed.
MUST be completed by Flamboro Speedway approved engine repair facility.
1″ carburetor spacer with maximum .065″ gaskets on either side.
GM 603 Crate Engine: Part # 88958603
GM 604 Crate Engine Part # 88958604 /GM 603 Crate Engine Part # 88958603,
Ford 347 Part # M-6007-D347SR, Ford 351 Part # M-6007-2351SR
Must be unaltered SEALED engines.
Crate engine must use damper supplied by manufacturer.
ALL engine repairs MUST be approved by Flamboro Speedway Tech Director.
Any approved repairs MUST be completed by Flamboro Speedway approved engine repair facility.
Must have an operational 6400 RPM rev chip installed.
GM 602 Crate Engine Part # 889586602/19258602 :
Must be unaltered SEALED engine.ALL engines Repairs MUST be approved by Flamboro Speedway Tech Director.
Any approved repairs MUST be completed by Flamboro Speedway approved engine repair facility.
Approved 602 changes: Double Roller Timing Chain & 7 or 6 1/2 deep oil pan, kick-out & 6-3/4 magnetic steel, non-fluid balancer must be completed by Flamboro Speedway approved engine repair facility.
Must have an operational 6400 RPM rev chip installed.

Chev 350 cu in .060 Max. overbore , Ford – Small Block 351 cu in .060 Max. overbore, Dodge 360 cu in .060 Max. overbore.

All engine blocks must be product of the manufacturer of the make for the engine being used in competition. Aftermarket engine blocks will not be permitted.
Aluminum blocks will not be permitted.
Must maintain stock lifter bore: Dodge .904 inch, Ford .875 inch, Chevrolet .842 inch.
Head Gasket. Any composite gasket allowed.
MAX Compression ratio 10:1 ratio. To be determined by tech officials.

Stock or aftermarket crankshafts will be allowed.
Minimum weight of 48 lbs.
No knife edging or bull nosing allowed.
No aluminum or fluid dampers.
OEM steel elastomer-type balancers only.
Aluminum pulleys allowed.

Hydraulic flat tappet cam or solid cam allowed.
Offset camshaft key allowed.
Must use stock-type timing chain and gears. Must maintain stock lifter bore: Dodge .904 inch, Ford .875 inch, Chevrolet .842 inch.
Stock O.E.M. or World Products or Dart IRON EAGLE cast iron straight plug only.
World Products cylinder heads allowed.
Sportsman 2 (straight plug only) • WP Casting #011250-1 Casting #1-037 • WP Casting # 011-250 (bare). PT #43500 Casting #1-052 • WP Casting #012150, 012250. PT #43600 PT #43610 Casting #1-052 • WP 012250 (bare).
World Product S/R Torquer Head Allowed. PT #42668 Casting #42678 PT#53028 Casting #1-056 Ford Windsor. PT #5303 Casting # 1-056 (For Windsor Jr. With Max. Valve size of 2.02)
Dart cylinder head IRON EAGLE part # 10021070 is allowed.
No porting, polishing or port matching of cylinder head, intake or exhaust manifolds; and no porting, polishing or relieving under the valves. Stock Only.
No special lightened valves. No titanium valves. No turning of valve stems.
An undercut valve may be used.
Ball method used to test valve stem to seat clearance. Ball size is .787 for intake and .531 for exhaust.
No GM angle plug heads. No GM head with cast number 292. No Chevy bow tie heads. GM Vortec heads only on sealed crate engines.
The maximum valve sizes as measured across the valve are as follows:
General Motors: Intake – 2.02 Exhaust – 1.65
Ford Cleveland: Intake – 2.04 Exhaust – 1.65
Ford Windsor: Intake – 1.94 Exhaust – 1.64
Chrysler Corp.: Intake – 2.02 Exhaust -1.65
Stock only diameter valve springs.
Roller Rockers Allowed
Screw in stud and guide plates allowed. No stud girdles or rev kits.

Any flat top.
6″ rods allowed.
Steel rods only.

These manifolds must remain as manufactured.
No port matching or flow work permitted.
Manifolds must not be painted.All part numbers are current design Edelbrock Performer series intake manifolds.
1st design manifolds with the same part # are not permitted.
Approved: Chevy #2101, Chrysler #2176, Ford Cleveland #2750, and Ford Windsor #2181.
Adapter to be one pc. Solid with no modifications and with gasket not to exceed a thickness of 1.25″ . No POLYMER compound adapters.
Option 1: Any windage tray may be used. Minimum ground clearance must be retained.
Option 2: Aftermarket racing-type kick out oil pan permitted. The oil pan must be wet- sump type.


NOTE: Interpretation of these rules will be solely up to the judgment of the officials in charge of the area in question. Flamboro Speedway reserves the right to impound non-complying components with no compensation to the owner(s). Noncompliance with the specifications outlined herein may subject violating teams to disqualification, loss of points and moneys and/or fine.


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