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                                           2024 STOCK 4A AND 4B RULES



The Monster Miniseries Association (MMSA) strives for the best 4cylinder competition around, hands down. We welcome each and every one to the 2023 Racing Season. The following rules are set for 2023 Racing Season. Good luck to every team.

The rules and regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govem the condition of all events sponsored and conducted by MMSA; however, there are certain rules and regulations that are set forth by each track that will have to be adhered to such as window nets, gloves anything of this nature. No express or implied warranty of safety shall result from publication of or compliance with these rules or regulations. They are intended as a guide for the conduct of the sport for each competitor and spectator.


Conduct / Penalties:

There should be respect and compassion for every race team, track promoter, track official and MMSA official. We must all carry ourselves in a professional manner at any event. MMS-4 wants everyone to experience a great time with hard, CLEAN racing for these big purse races. Keep in mind, if we go to these tracks and do not conduct ourselves in a civil manner (arguing, fighting, etc.) these tracks will not have us back. Put on a good show, take your cars home in one piece and be ready for our next event. Along with clean racing this applies to the crew as well. Drivers are responsible for each and every crewmember on their team. If your team is aggressive or initiates a fight with another MMSA race team, the DRIVER of the aggressor's team will be penalized. Remember: The DRIVER is responsible for EVERY crewmember.

Punishable Offenses:

  • Hitting another car under caution or after the race has been completed

  • Exiting your car in an aggressive manner and approaching a competitor (this includes the pit area).

  • A crewmember engaging another driver/crew in an aggressive manner (this includes texting, social media, etc.).

  • Cursing track or MMSA officials.

  • Failure to comply with policy with a seasonal ban could result in a lifetime ban.

Any act that MMSA deems as intentional could result in following penalties.

First Offense:

Two-race suspension; points and monies forfeited for that night and possible fines before reinstatement.

Second Offense:

Banned for the remainder of the MMSA season; monies for that night and points for the ENTIRE season forfeited and possible fines before reinstatement. Third Offense:

LIFETIME ban from ALL MMSA events


 Protest Procedures:

A protest fee and written request must be made to the Technical

Inspector within 5 minutes of the end of the main event (Checkered Flag).

  1. In order to protest a car, you must finish behind that car, or you have the option to protest each car that finishes ahead you. If it is a multi-car you must protest each car on the same items.

  2. 2 items $300 with a $100 acceptance fee with MMSWTRACK retaining $100

  3. Bottom End $400 check for stock crankshaft and steel connecting rods with a $100 acceptance fee with MMSWTRACK retaining $ 100

  4. Complete Engine $800 this will consist of camshaft, head, intake/ spacer, carburetor, cc's, crankshaft and steel connecting rods with a $200 acceptance fee with MMSA/TRACK retaining $200

  5. Bumper To Bumper $1,100 this will consist of complete engine, flywheel assembly, transmission, rear end, suspension and checking for traction control with a $250 acceptance fee. With MMSA/TRACK retaining $250

  6. Fuel Trackside $50 can be protested as a single item or used as a third item only in another protest. On multi-car protest, ifprotesting fuel only, any car finishing ahead of that car can be protested on Fuel Only. No acceptance fee $50 retained by MMSA/TRACK.

  7. Fuel Lab Test $150 will be sent to an independent lab and compared to VP samples with a $150 acceptance fee. Can be protested as a single item or used as a third item only in another protest. On multicar protest, if protesting fuel only, any car finishing ahead of that car can be protested on Fuel Only.

  8. Tire Benchmark Protest S 125 per tire with $125 acceptance fee. 3 stripes from specified tire the protester wants checked will be sent to an independent lab for testing. This can be protested after qualifying or main event. Tire sample MUST make benchmark provided by Hoosier to the lab. If protesting tire only, any car finishing ahead of that car can be protested on tires only.

  9. Tire Chemical Scan Protest $300 per tire with $300 acceptance fee. 3 stripes from specified tire the protester wants checked will be sent to an independent lab for testing. This can be protested after qualifying or main event. Tire sample MUST match sample provided by Hoosier to the lab. If protesting tire only, any car finishing ahead of that car can be protested on tires only.

  10. Visual protest is $50 retained by the MMSA/ TRACK TECH must be made within 30 minutes before qualifying, heat race or main event. This includes Bodies

  11. If protested, you have the right to back protest. Protested car has 5

minutes to decide if they want to back protest. After all protest has been filed parts must be ready for inspection within half (1/2) hour. (Tech man discretion)

  1. Once a protest has been filed it will be final. There will be no dropping protest.

M)Anything found illegal may be confiscated by the MMSA and fines will be induced before the next MMSA sanctioned event.


Pre-Race Inspection:

All cars must go through pre-race inspection. At this point a MMSA official has the right to check the following: carburetor, suspension, body or chassis. Driver/ Crew is responsible for informing MMSA / Track Tech of any penalties or weight breaks. All heat shields are to be removed at this time. If found not to meet MMSA rules you could be subject to change the pan or add weight at this time. Pre-Race inspection ends when the drivers' meeting starts, you must be in line. If you do not go through pre-race inspection you will be penalized and first out for qualifying or starting last in the last heat race.


Post-Race Inspection:

The top 5 cars in the feature are to cross the scales with the top 3 proceeding to the tech area.



Sign in: Must have someone to pay entry fee in person in order to be put on the list.

RACE: On any start or restart, anyone jumping out of line or firing before the green is out will be warned ONE time. Do it a second time you will be put back ONE ROW. Third time you go to the TAIL OF THE FIELD. In the event of a caution with 5 laps or less, the restart will be single file. A lap is complete when the leader plus 4 cross the line (Top 5).

Any infraction of the rules that are not listed will be dealt with at time of infraction and penalties imposed up to suspension from the series depending on the nature of the infraction. MMSA HAS FINAL SA Y!



All cars must have a roll cage that has been approved by the

MMSA/TRACK. All drivers MUST wear a full fire suit (jacket and pants). Gloves, racing shoes and window nets are recommended. All cars MUST have a working Fire extinguisher within the reach of the driver. Driver is not to exit car unless it is on fire or upside down. If driver exit's car for any other reason is subject to be disqualified. NO TWO-WAY RADIO'S, Race Receiver only, mirror's OK. It is also recommended to have a full containment seat or head / neck restraint device. You will be given a 251b weight penalty for not having a full containment seat or neck restraint (this is for 1 NOT each). All added weight MUST be secured by h" bolt and painted white with car # on it.


The official Fuel of the MMSA is VP Racing Fuel:

VP        or VP 114

Fuel is to be NON-OXYGENATED

Buying fuel from the track is allowed but MUST inform Tech that fuel was purchased from track if fuel is checked.

It is highly recommended to purchase fuel from the series by the drum or gallon from the series trailer.



  1. Any two or four door foreign or domestic car with a 94-101.5 wheelbase. Wheelbase must match make and model of car.

  2. Must have correct CCs listed on hood with penalties and weight breaks added for scales. If not listed correctly you could be disqualified.

  3. May have a complete aluminum body but must retain stock shape and appearance. (See Body Measurements) D) Inner panels may be removed. E) NO FWD or MID Engine cars

  1. Must have floor pan on both sides to rear of front seats.

  2. Must have a rear firewall or drivers' compartment must be boxed in

  3. After market nose piece OK. No wider than I inch outside of tires.

      Front fenders must be made of steel or aluminum. (NO MD 3 STYLE\



  1. May run a 6-inch rear spoiler— can't go over side of quarter panel — no wider than the width of the car — spill plates OK spill plate measurements bottom is 16 inches rear 8 inches high 4 inches across the top rear and 4 inches high in the front. (See body measurements)

  2. Interior spoiler no more than 4 inches high and NO higher than dash.

  3. Rear bumpers must NOT extend past the inside of the rear tires unless it has a bumper cover or turns forward (if turned forward must be on a 900 angle NO SHARP CORNERS / EDGES) L) Nose 70-inch maximum width. M) 68-inch maximum width at ANY point.

  1. 38-inch maximum ground to deck (bottom of spoiler).

  2. Optional: Rear of car can remain open. Aluminum ok to close rear of car.

  3. May use Lexan in rear windows. Q) Must run hood.

  1. Breather may stick through hood.

  2. NO Cold Air boxes allowed

  3. May have heat shield under hood, over the header only no longer than length of cylinder head. NO COMPLETE HOOD UNDER HOOD. U) May have hole in firewall big enough for the header to pass through (tech discretion if hole is too big).

V) May replace top 1/4 of firewall with steel or aluminum (this doesn't mean the whole firewall) no lower than original master cylinder hole in firewall. No holes above or below the deck.

Oan 34 J I I

** Acceptable body infractions will result up to a 501b weight penalty in the area of the infraction* *

** All body infractions are not acceptable tech man discretion* *


Chassis / Suspension:

  1. Must have a roll cage and all safety equipment.

  2. All chassis /suspension components must be either OEM or OEM replacement and to be UNALTERED unless specified throughout the following rules.

  3. Roll cage must be secured to the unibody.

  4. NO Tube Chassis Allowed.

  5. May tie chassis together by splitting floor pan and put square tubing in from the top and may stick through floor pan BUT NOT totally undemeath. NO "X" Bracing Under Floor Pan.

  6. Square / roll cage tubing from strut towers forward is acceptable. G) May use square tubing or roll cage material from back of shock mounts to rear of car must be straight no angling of material.

  1. All A frame, trailing arms and leaf spring mounts must be stock and mounted in STOCK location (may cut lower A frame for caster / camber adjustments)

  2. May take spindle that came on car and machine to fit a later model strut. All machining and or shims must be parallel. No angle milling/ grinding to enhance performance.

  3. May cut Top trailing arm (s) or re drill for pinion angle only.

  4. May have spring locator/ bucket on lower control arm to keep spring in location. L) Lowering blocks ok

M)Leaf spring cars may lengthen rear shackle.

  1. Caster / Camber plates ok

  2. Adjustable buckets or Jacking Bolts are ok but MUST remain in STOCK location (Buckets or Jack Bolts may be raised for spring travel). If not in STOCK location, you may be subject to a weight penalty. Buckets or Jack Bolt Must Be in Fixed Location. (Tech's

Discretion) (May select a random car to measure by for comparison) P) Ford may run coil over on front struts.

  1. May cut upper or lower control arm for caster / camber.

  2. May cut pan hard bar must be NON-ADJUSTABLE. Must be located in STOCK location.

  3. Mono Balls Allowed

  4. Stock Mounted body shocks may have helms (bottom only) shocks may be adjustable (dampening) NO CANISTER STYLE SHOCKS ALLOWED

  5. May adjust shocks for travel but not change the angle of the shock

(Not mounted to roll cage) (No adjustable bracket)

  1. Offset in steering rack ok

W) Bump steer Not Allowed (NO Heims or shims/ spacers to level tie rod ends)

  1. ** If any suspension component not in STOCK location you will be subject to a weight penalty.

  2. ** $100 buy rule per shock ** This is for shock only!

  3. ** $200 buy rule per strut ** This is for strut only NO SPRING!


Brake System:

  1. 4-wheel disk brakes permitted must have OEM components

  2. Dual master cylinder permitted. C) 3-wheel brake shut off permitted

  3. No adjuster for brakes from front to rear in reach of driver.

  4. Stock rotors and drums No lightening but may remove caliper and rotor on RF Only (Ford on a Ford Toyota on a Toyota).


Wheels & Tires:

  1. Wheels Steel 8" maximum width. Bead locks ok (bead lock must face outward).

  2. May have bead locks on all 4 wheels.

  3. AMERICAN RACER 57 8" TIRES ONLY (NO GROOVING or SIPPING) D) No chemicals allowed (see protest) HOOSIER IS FOR SERIES RACES ONLY!!!!

  4. Must meet Hoosier benchmark at an independent lab.

  5. Needling allowed


Rear ends:

  1. Any stock up to 8.8 for make of car.

  2. No gun drilled axles (may weigh axles to compare if necessary)

  3. Axle- Stock OEM or an OEM replacement permitted (may weigh to compare if necessary) D) No full spools

  4. Mini spool OK steel only.

  5. May lock rear end by weld, mini spool, limited slip (limited slip unit must be stock NO aftermarket units).


  7. May run cut gear.

** ENGINE: ALL Engine core Parts (ex: Block, Head, Crankshaft and Intake) Must Have Been

Available on Cars or Trucks Sold to the General Public by Mass Production. All Parts Must Be

OEM of the Same Brand Vehicle You Are Racing.




Engine option #1 S.C. Stock 4 type weight / 1b 20001b Minimum. See CC's weight:

  1. Stock engine location — no setbacks.

  2. No engines with more than 2 valves per cylinder.

  3. Ford in a Ford: Toyota in a Toyota.

  4. No rotary or turbo or double overhead cam engines permitted

  5. Cannot mix and match different cc engines to come up with odd ball cc's must stay basic bore and stroke combo's that was produced by the manufacture.

  6. OEM blocks only .080 over bore max (other than listed). 5cc for wear not to exceed 2500cc + .08 over bore. Toyota 3tc may bore to .120 over

  7. Ford may Sleeve a 2300cc block to a 2000cc.

  8. Aluminum cam gear or pulley allowed.

  9. Any steel connecting rod- no aluminum, titanium or carbon fiber J) NO titanium wrist pins.

  1. Only Babbitt style bearings Allowed (No roller bearings) coated ok.

  2. Stock crank with stock stroke ± .01 tolerances.

M)Crankshaft rod journals maybe ground no smaller than 1.771

  1. NO AFTERMARKET CRANKS. (Stock lightened crank must add 501bs in front of firewall)

  2. All engines must use an in-block wet sump oil system.

  3. Racing oil pans permitted.

  4. NO dry sumps allowed.

  5. Any flat top piston — Toyotas 1600 and 1800 may run dome of .235 tall only.

  6. Formula for cc's- bore X bore X .7854 X stroke X 4 = cid then divide cid into .061= cc's. Tolerance is 5cc for wear. T) May have E-Vac to header only NO VACCUM PUMPS.

  1. May run electric water pump.

  2. May run electric fuel pump.

W)lgnition — stock or Mel's Ignition ONLY (NO BOOSTERS on

Ignition). (No Traction control allowed) (NO ECU Units) (NO MSD Style) (NO MSD Style Ignition Boxes) X) Single Ignition coil Only.

Y) Radiator must be mounted in front of engine.




  2. OEM may be changed from one size engine to another without modification.

  3. May have competition valve job with any angle or depth must not touch bottom of valve boss.

  4. All angles MUST be concentric with valve guide.

  5. Any steel valve stock diameter may be undercut stem + .009 tolerances.

  6. Valve stem must be stock diameter for year model of head. (No 7mm valve stem in a Ford)

  7. Double valve springs ok must be steel

  8. Beehive valve springs ok must be steel

  9. Any steel retainer

  10. Lifter has to be stock diameter — solid ok


  12. NO "MB" head allowed




  2. OEM may change from one size engine to another without modification unless stated.

  3. Ford must run D4, D9 or El style intake. Anything other than listed must be approved by MMSA/ Track Tech. D) No fuel injection manifolds E) Must be single carburetor.

  1. No side draft intakes.

  2. OEM style gasket only. (.07 max thickness)

  3. May modify for carburetor but must be approved before race by MMSA tech. 1) May bore straight down for clearance - NO TAPERING, RADIUS or BLENDING.

J) Intake gasket is part of intake protest.



A) Stock carburetor or Holley 350 cfm (#7448 or 0-80787-1) or Holley 500 cfm #4412 must pass no go gauges. B) Must have air horn with number.

  1. Float bowl must face forward

  2. May cut end of screws and have holes in butterflies

  3. No thinning of shafts

  4. No polishing or grinding

  5. Spacer and adapter — any 1" max thickness together — NO TOLERANCE. Spacer cannot protrude into intake. H) 2 gaskets @ .07 thickness maximum each Camshaft:



  1. Solid or Hydraulic NO ROLLERS

  2. Maximum .425 lift at valve with .025 lash at valve for solid

  3. Hydraulic ANY LIFT

  4. Hydraulic lifter must collapse or be taken apart for inspection

  5. No swapping of any lobes — must be in stock order

  6. No roller or needle bearings stock type only coated oK

  7. Flywheel & Clutch Assembly:

  8. Aftermarket flywheel and clutch 0K (NO COUPLERS)

  9. Stock 111bs minimum flywheel will receive 301bs weight break (must be stock lightened flywheel)

  10. Must have stock or stock replacement clutch and pressure plate if claiming stock flywheel.


  12. Only grinding, adding weight or drilled holes to pressure plate for balancing. Drilled hole size is 7/16 diameter max (NOT all the way around pressure plate). If there are holes all the way around pressure plate it WILL be considered lightening.

  13. Studs for pressure plate ok (must be a purchased stud, no custom machined studs allowed)

  14. Cannot relocate pressure plate bolt hole pattern



A) MUST BE STOCK with all working forward and reverse gears. B) Cannot remove or lighten drive or reverse gears.

  1. May remove speedometer gears only.




  1. Minimum of I h" diameter

  2. Must be steel

  3. Must have a safety loop

  4. Must be painted white with number on it.



  1. Spec Schoenfeld Fords may run # f-234v or # f-235v

  2. Spec Schoenfeld Toyota may run # t-168 or stock manifold

  3. These headers are the only ones allowed with SC type stock 4 rules.

  4. May be coated or wrapped only must remain as it came from

Schoenfeld. (If wrapped you may be subject to unwrap for inspection) E) Nothing should protrude into collector if so it WILL be subject to a Disqualification.

  1. OEM style gasket only factory replacement or from Schoenfeld.

  2. If Schoenfeld doesn't offer a header then a Stock Manifold MUST be used. No homemade headers.


CC Weight's, Weight Break's and Penalties:

  1. Toyota 2tc & 3tc must weigh 2000 lbs. minimum

  2. Ford 2.0 must weigh 2150 lbs. minimum

  3. Any other than listed must weigh 11b per cc

  4. For not having a HANS / Full Containment Seat +251bs (l or the other not for both).

  5. Stock 111bs minimum Flywheel -301bs

  6. Lightened Crankshaft +501bs (in front of firewall)

  7. —11b per lap burn off (main event only) MMSA sanctioned race.

  8. 51b tolerance at scales.

  9. CC's and all weight breaks / penalties, and weight TOTAL MUST be listed on each side of front fenders or hood. All breaks and penalties should be told to MMSA tech at pre-race inspection for documentation. If not listed or documented MMSA has the right to DQ after qualifying or main feature. 



MMSA will go by the scales that each track provides for everyone. It is the responsibility of each track to provide scales and we have to use what is provided.

















38' Max

**If You Are Caught Cheating for A Major Violation such as porting, light crank not claimed, stroked crankshaft, NOS, anything listed NOT Allowed, or something without a doubt you knew was cheating you will be stripped of all points, winnings and banned for 365 days or fined SS. Minor Offense you will forfeit all points and winnings for that night and possible race suspension & fines (MMSA discretion).**




Once a Driver wins 5 RACES during the 2023 Calendar Year he must move up the following

year. However if the Driver decides to move up during the 2024 Calendar Year he will LOSE


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