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Mud-A-Thon

Date: July 23, 2022
Time: 6:00 PM
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Mud-A-Thon
Saturday, July 23, 2022
Registration - 2:00 pm - 6:00 pm
Start Time - 6:00 pm

Event Promoter: Flint Hills Mud Boggers
Jonny Evans (816) 565-0789
Ronnie Spillman (785) 229-5328

RULES:
OPEN CLASS
This class is designed for vehicles that have been highly modified for competition. Allowing any Chassis, Body and Engine.

BODY
1. Steel, Fiberglass or Aluminum body is required.
2. Firewall and floor pan must be present to protect the driver from engine and drivetrain components.
3. Windshield not required. Factory glass or Lexan is allowed. Drivers must wear a full face helmet or goggles if no windshield is present.
4. Driver location optional.

CHASSIS
1. Any safely constructed chassis design is allowed. Subject to Tech Official approval.
2. Minimum 6 point roll cage.
3. Any style suspension allowed.
4. Any front and rear differential is allowed.
5. Any transfer case is allowed.
6. Transmission modifications and transmission brakes are allowed. Must have a transmission blanket or approved scatter shield.
7. Any type tire allowed.
8. Drive shaft loops & U-joint covers required.

ENGINE
1. Any engine allowed.
2. Engine location optional.
3. Any style engine block allowed.
4. Fuel injection systems allowed.
5. Any style heads and intake allowed.
6. Single and dual carburetors allowed.
7. Vacuum pumps and dry sumps allowed.
8. Nitrous, turbo, and supercharger systems are allowed.

OUTLAW CLASS
BODY
1. Any body is allowed, must retain factory appearance.
2. Firewall and floor pan must be present to protect the driver from engine and drivetrain components.
3. Windshield not required. Factory glass or Lexan is allowed. Drivers must wear a full face helmet or goggles if no windshield is present.
4. Headlights and tail lights are not required.
5. Driver location optional. Must be no more than 84" from the centerline of the front axle to seat back.

CHASSIS
1. Full factory frame or equivalent is required. Back halves are allowed (No tube rails frame chassis allowed).
2. Minimum 6 point roll cage.
3. Any style suspension allowed.
4. Any front and rear differential is allowed.
5. Any transfer case is allowed.
6. Transmission modifications and transmission brakes are allowed. Must have a transmission blanket or approved scatter shield.
7. Tires are to be DOT (highway legal), may be altered (cut), maximum of 50" tall. You can also run paddles.
8. Drive shaft loops & u-joint covers required.

ENGINE
1. Any automotive type engine allowed.
2. Any style engine block allowed.
3. Fuel injection systems allowed.
4. Any style heads and intake allowed.
5. Single and dual carburetors allowed.
6. Vacuum pumps and dry sumps allowed.
7. Nitrous, turbo, and supercharger systems are allowed.

TRACTOR TIRE CLASS
This class is designed for vehicles that have been highly modified for competition. Allowing any Body, Chassis, and Engine.
1. Body id required.
2. Firewall and floor pan must be present to protect the driver from engine and drivetrain components.
3. Windshield is not required. Factory glass or Lexan is allowed. Driver must wear full face helmet or goggles if no windshield is present.
4. Driver location optional.

CHASSIS
1. Any safely constructed chassis design is allowed. Subject to Tech Official approval.
2. Minimum 6 point roll cage.
3. Any style suspension allowed.
4. Any front and rear differential is allowed.
5. Any transfer case allowed.
6. Transmission modifications and transmission brakes are allowed. Must have a tranny blanket or approved scatter shield.
7. Tires are to be agricultural or industrial use tires. Implement and rib tires are allowed. Must be 2 Tractor tires on rear and uncut dots on the front or 4 Tractor tires all around.

ENGINE
1. Any type of engine allowed.
2. Engine location optional.
3. Any style engine block allowed.
4. Fuel injection systems allowed.
5. Any style heads and intake allowed.
6. Single and dual carburetors allowed.
7. Vacuum pumps and dry sumps allowed.
8. Nitrous, turbo, and supercharger systems are not allowed.

CLASS 5
This class is designed for vehicles that have been highly modified for competition. Vehicles may be gutted, but must remain factory appearance and frame. Any engine, frame, body combination is allowed.

BODY
1. Stock steel cab required, OEM replacement fiberglass panels, hoods, fenders, etc. allowed. Full race bodies are not allowed.
2. Gutting is allowed.
3. Firewall may be modified or relocated. Must still retain the stock firewall equivalent.
4. Windshield not required. Factory glass or Lexan is allowed. Drivers must wear a full face helmet or goggles if no windshield is present.
5. Headlights and tail lights are not required.
6. Driver location optional. Must be no more than 84" from the centerline of the front axle to seat back.
7. Removal of bumpers is allowed.

CHASSIS
1. Full uncut frame from centerline of front axle to centerline of rear axle. No halves allowed.
2. Minimum of 6 point roll cage.
3. Lift kits and ladder bars are allowed. Removal of leaves in a spring pack is allowed. Must retain a minimum of 2 leaves and must be operational by original OEM design intent. Coil over shocks are
allowed in front only with ladder bars. 3, 4, and 5 link suspensions are allowed. Factory non-adjustable.
4. Any front and rear differential is allowed. Unimog/Rockwell style allowed. No final drives allowed.
5. Must have OEM design transfer case. l No chain drive or quick change cases allowed. Must have a
tranny blanket or approved scatter shield.
6. Fuel cells are allowed. Removal of factory fuel tanks is encouraged. Battery and Radiator may be
relocated.
7. Transmission modifications and transmission brakes are allowed.
8. Tires are to be DOT (highway legal), unaltered, maximum of 40" tall.
9. Drive shaft loops & U-joint covers required.

ENGINE
ENGINE
1. Any automotive type engine allowed. Alcohol is allowed.
2. Front face harmonic balancer must not be behind the centerline of the front axle.
3. No aftermarket aluminum engine blocks. Must be OEM.
4. OEM fuel injection systems allowed.
5. Aluminum heads and intake allowed. Pro style and exotic or spread port style heads are not allowed. (Conventional heads only)
6. Single carburetor with maximum of 4 barrels allowed.
7. Vacuum pumps and dry sumps allowed.
8. Nitrous, turbo, and supercharger systems are not allowed.

CLASS 5 -WOMENS
This class is designed for Women and will follow CLASS 5 Rules.

CLASS 4B-38.5
This class is designed for vehicles that have been highly modified for competition. Vehicles may be gutted, but must retain factory appearance and frame. Any engine, frame, body combination is allowed.

BODY
1. Stock steel body required. OEM replacement fiberglass panel, hoods, fenders, etc. allowed. Full race bodies are not allowed.
2. Gutting is allowed.
3. Firewall may be modified or relocated. Must still retain the stock firewall equivalent.
4. Windshield not required. Factory glass or Lexan is allowed. Drivers must wear a full face helmet or goggles if no windshield is present.
5. Headlights and tail lights are not required.
6. Driver seat may be moved side to side, but may noy be moved forward or rearward.
7. Removal of bumpers is allowed.

CHASSIS
1. Full uncut factory frame from centerline of front axle to centerline of rear axle. No brake halves allowed.
2. Minimum 6 point roll cage.
3. Maximum distance from centerline of front axle to seat back is 84".
4. Lift kits and Ladder bars are allowed. Removal of leaves in the spring pack is allowed. Must retain a minimum of 2 leaves and must be operational by OEM design intent. Coil over shocks are not allowed. 4 and 5 link suspensions are not allowed.
5. Any OEM design front and rear differential is allowed. No final drivers allowed. No Unimog/Rockwell style allowed.
6. Must have an OEM design transfer case. No chain drive, divorced, or quick change cases are allowed.
7. Fuel cells are allowed. Removal of factory tanks is encouraged. Battery and radiator may be relocated.
8. Transmission modifications and transmission brakes are allowed. Transmission blanket or scatter shield required.
9. Tires are to be DOT (highway legal), unaltered, maximum of 38.5" tall.
10. Drive shaft loops U-joint covers required.

ENGINE
1. Any automotive type engine allowed.
2. Front face harmonic balancer must not be behind the centerline of the front axle.
3. No aftermarket aluminum engine blocks. Must be OEM.
4. OEM fuel injection systems allowed.
5. Aluminum heads and intake allowed. Pro style and spread port style heads are not allowed.
6. Single carburetor with maximum of 4 barrels allowed.
7. Vacuum pumps and dry sumps allowed.
8. Nitrous, turbo, and supercharger systems are not allowed.

CLASS-4 MODIFIED STOCK
This class is designed for vehicles that retain mostly stock components and have been mildly modified for competition. No Mid Size trucks with V8 engines allowed, unless factory engine. No Mid Size trucks with axle upgrades allowed. All components must have the same OEM design. Class 4 has 36.5" maximum tire size.

BODY
1. Factory produced street vehicles only.
2. Stock wheelbase to match stock body, no engine setbacks.
3. Must have a full factory body. No cutting on the body, except trimming fender corners to clear larger tires. May remove topper.(Broncos, Blazers, Chargers)
4. Must retain a full factory floor pan and have a full factory dash. Aftermarket gauges are allowed.
5. Must have a factory windshield.
6. No gutting of the interior allowed. Removal of panels, and carpet is allowed.
7. Headlights and tail lights may be removed.
8. Race seats with 4 or 5 point harnesses allowed in place of stock seats. Must have a full 6 point roll
cage installed also. Must have a minimum of 2 seats, must have seat belts for all seats.
9. Factory replacement fiberglass hood is allowed. Factory fiberglass stepside bed allowed.

CHASSIS
1. Full uncut factory frame front to rear.
2. Minimum 4 point roll cage required for open top and soft top vehicles.
3. Stock factory offered suspension must be retained. Lift kits and ladder bars are allowed. No floaters or coil over shocks.
4. Radiator must be installed in factory offered location and in proper working order.
5. Tires are to be DOT (highway legal), unaltered and 36” tall Maximum

POWERTRAIN
1. Engine must be in stock location and match the Chassis body (Chevy to Chevy, Ford to Ford, etc...)
2. Engine blocks must be factory offered. Replacement iron heads allowed. No aluminum or pro heads allowed (Conventional heads only).
3. Transmission must be factory offered.
4. Pump gas and high octane gasoline allowed. Alcohol and Methanol are not allowed. Diesel fuel subject to tech approval.
5. Must be a single carburetor.
6. Aftermarket Ignition systems allowed. (MSD Style)
7. Open header exhaust allowed. (Must be down swept).
8. Nitrous, turbo, and supercharger systems are not allowed. Factory turbo permitted on diesel or factory option. (must match year).
9. Must have a factory offered transfer case.
10. Addition of a fuel cell is allowed. Removal of factory fuel tanks is allowed. Electric fuel pump conversion is allowed.
11. Electric Fan, water pump is allowed, may remove alternator, or powers steering.
12. Axle upgrades are allowed. Must be of the same factory make as the vehicle, or factory offered option.

CLASS-3 STOCK
This class is designed for trucks and jeeps that retain all stock components or have been slightly modified for competition. With beginners and hobbyists in mind, this is in the entry level mud racing class.

BODY
1. Factory produced street vehicles only. No body swaps allowed.
2. Stock wheelbase to match stock body, no engine setbacks.
3. Must have a full factory body. No cutting on the body, except trimming fender corners to clear larger
tires.
4. Must retain a full factory floor pan and have a full factory dash. Aftermarket gauges are allowed.
5. Must have factory windshield or factory type glass. No Lexan allowed.
6. No gutting of the interior allowed.
7.Headlights and tail lights may be removed.
8.Roll cage is allowed.
9. 5/6 point harness allowed.
10. Race seats are allowed. Vehicle must have 2 seats. If the cage is not installed with race seats, then you can only wear the lap belts.

CHASSIS
1.Full uncut factory frame front to rear.
2. Minimum 4 point roll cage required for open top and soft top vehicles.
3. Stock factory offered suspension must be retained. Lift kits are allowed. No ladder bars, floaters, or coil over shocks.
4. Radiator and battery must be installed in factory offered locations and in working order.
5. Tires are to be DOT (highway legal),unaltered, maximum of 38.5" tall.

POWERTRAIN
1. Engine must be in stock location with all stock components except A/C(no Electric fans allowed).
2. All main engine components must be factory offered. This includes the engine block and heads.
3. Transmission must be factory offered.
4. Must use pump gas. No race fuels, scents, or perfumes of any kind allowed. Diesel fuel subject to tech approval.
5. Must use a factory style ignition system. No aftermarket ignition of any style.
6. Must be single stock or OEM replacement carburetor only. Edelbrock or Holley 4150 style allowed. No Predators, Demons, Dominators, etc.
7. Must be stock or OEM replacement intake manifold. Must retain factory height carburetor plane. No
high rise Intakes, or carb spacers.
8. Exhaust must, at minimum, extend to transmission output flange or rear wall of carb, whichever is
greater. Headers are allowed. Vertically exhaust is allowed, if routed within 12" of the rear cab wall.
10. Must have a factory offered transfer case. Must match the make of the vehicle.
11. Addition of fuel cell is allowed. Removal of factory fuel tanks is allowed. Electric fuel pump is allowed.
12. Factory cooling fans must be installed and fully operating in stock locations. May also add an electric fan, but still must run the factory fan.
13. Axle upgrades are allowed. Must match the make of vehicle, or factory offered option. Must have an equal number of studs at each wheel.
14. Vacuum 18 at 2,100rpm and 3 up grades
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Sponsors

N.K.C. Beverage Company, Inc.
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