Note: Vehicles in this division must have four wheel drive.

A. A. Body/Chassis
1. 1. Vehicle must have hood, grill and fenders in place as intended by manufacturer.
Note: Contact Ken-Ten Technical Services for variance.
2. 2. Vehicle body style must be or have been available from a dealer as mass
production.
3. 3. Vehicle must maintain original appearance.
4. 4. Vehicle appearance;
a. a.Must have metal cab on outer skin.
b. b. No cab and bare chassis, or flat beds permitted.
c. c.Must have metal fenders, doors, frame, hood and bed shell.
d. d. Non-metal floor allowed in bed.
e. e.Fiberglass hood scoops, spoilers, fender flares are allowed.
f. f. Allowed to use stock appearing pickup truck and van fiberglass bodies and body parts.
5. 5. Side doors must be mounted and closed if vehicle was manufactured with doors.
6. 6. Truck doors must have a single latch design, allowing the door to be opened from both inside and outside.
7. 7. Flip-top body type vehicles and vehicles that do not have 2 working doors must have door glass lowered or removed while under green flag.
8. 8. Vehicles with less than stock size window openings must have an escape hatch with a minimum size of 17 inches x 18 inches, or large enough for driver to exit.
Note: Escape hatch will not be counted as a working door.
9. 9. No air shock type devices or air bags are allowed.
10. 10. Adjustable front suspension stops must be mechanical. Pneumatic, hydraulic, or electrical adjustable stops are not allowed.
11. 11. Vehicles must have safety glass or plexiglass in windshield and rear window.
12. 12. Stained or smoked glass is not allowed.
13. 13. Tinted windows, which impair the track official’s view of the driver’s compartment, are not allowed.
14. 14. Vehicles in this division must have vertical bumpers at the rearmost point of the vehicle. Bottom of bumper to be a minimum of 8 inches vertically. Must be rigid
15. 15. Hood line variance: Original hood line should be kept and a 3 inch maximum clearance opening will be allowed for speed equipment.
16. 16. Stock appearance must be maintained.
17. 17. Rear of engine block may not be moved forward of centerline of front axle.
18. 18. Engine must remain behind grill.
19. 19. All weights must be safely secured to truck. Weights and brackets must not extend more than 60 inches from the centerline of the front wheel. Weight bracket should not extend over 7 foot at its widest point.
20. 20. Wheelbase should not exceed more than 133 inches. (Tubular frame is accepted).
21. 21. Planetary transmission is permitted. (Must be covered with a SFI 4.1 blanket).

B. Driveline/Driveline Shielding
1. 1. If planetary reductions at wheels are used, the following drive shaft shielding
criteria will apply. No cast metal.
a. a.All remaining drive train, excluding additional manual transmissions must be enclosed by 5/16 inch minimum steel or 3/8 inch aluminum, round. Inside diameter not to exceed 2 inches more than outside diameter of largest universal joint, fastened every 6 inches or closer, with 3/8 inch or larger bolts, Grade #5, or butt and seam welded, and securely mounted to vehicle’s frame. Applies to all vehicles with exposed drive shaft. No more than ¼ inch of end driveline shall be visible with driveline shielding in place.
Note: If U-joints are used in any drive shaft application, the shielding must be 5/16 inch steel,
or 3/8 inch aluminum with 1/8 inch steel insert in aluminum. The insert must be a
minimum of 6 inches wide.
b. b. All 4WD vehicles engine/automatic transmission combinations must
Have either:
1. 1. Two front engine mounts, two rear engine mounts, and a support
saddle for rear transmission, with ½ inch maximum clearance, OR
2. Two front engine mounts, support saddle at rear of engine, with
½ inch clearance and a mount at rear transmission.
c. c.Transmission is required to have an SFI transmission blanket that
extends from front to rear of transmission or SFI approved shield that extends from front to the rear of transmission.
Note: This is to prevent engine or transmission from dropping if breakage occurs.
2. 2. Drive shafts between engine and transfer case must have solid shielding a
minimum of 3/8 inch aluminum or 5/16 inch steel.
3. 3. Vehicle must have 360 degree metal shield around the universal joints, 3/8 inch
aluminum or 5/16 inch steel, minimum width 6 inches.
Note: If a split design is used, mount as in rule 1:a. above.
4. 4. Axle and hub bolt shield required, except where planetary drives are used.
a. a.Shield must be at least 0.060 inch thick.
b. b. Minimum diameter of axle end or hub bolts to be covered on both front and rear axles.
c. c.Mounting shield may not be mounted to axle end or hub bolts.
d. d. A hole may be installed in center of front shield so lock can be operated, so long as hub end and or axle bolts are covered.
5. 5. No counter balancers permitted in driveline.

C. Engines/Engine Limitations
1. 1. Vehicles are limited to a single automotive-type engine.
Note: Automotive engine is any engine or it’s replica available in a passenger car. Maximum
(8) cylinders. A replica to e considered legal must accept and swing a stock crankshaft.





No diesel engines permitted.
a. a. At all levels of Ken-Ten competition maximum of 900 cubic inches
naturally aspirated engine.
b. b. Supercharged engines are limited to 8-71 standard rotored blowers at
50% overdrive. All other supercharged engines are limited to 30% overdrive maximum.
c. c. No electronic control devices that change the timing while the vehicle is
in motion and/or any traction control devices.
2. 2. Engines may be naturally aspirated or supercharged.
3. 3. Acceptable fuels are gasoline and alcohol.
4. 4. Engine must be in stock location, which is defined as being within engine compartment as manufactured, behind stock grill, and in front of firewall.
5. 5. Vehicle may run without radiator, and engine may be moved forward, but engine must stay behind the grill.
Note: Entire engine, meaning anything that is bolted to the engine block.
6. 6. Except for high performance type starters with crankshaft drive, rear engine block
may not be moved forward of center line of front axle.
7. 7. Automotive engines at all levels of competition are only allowed to run maximum
of 2 valves per cylinder and 1 spark plug per cylinder.
8. 8. Fuel injection (and carburetors) and headers may protrude through the hood.
Note: Bubble or scoop is optional, but if used, the bubble or scoop must cover the carburetors
of fuel injection, if induction system protrudes through the hood.
9. 9. Maximum on boring space to be 5.000 inches on center.
10. 10. Vehicle must have a vertical exiting exhaust. Height of pipe must be a minimum of 1 foot above the bend.
Note: Vertical is defined as “being in plumb” with a 10 degrees variance in any direction
permitted.
11. 11. 4WD vehicles must have provision on crankshaft to accommodate ½ inch square
drive at 1 to 1 ratio for use of cubic inch test.
12. 12. Supercharged engines are limited to 500 cubic inches.
13. 13. Vehicles are limited to two valves per cylinder head, and one spark plug per cylinder.
14. 14. Blowers are limited to one pressure stage.

D. Frames
15. 15. May be different than the make and model of truck body.
16. 16. Tubular steel frame is allowed.
17. 17. Center of wheels cannot exceed plus or minus 6 inches of fender wells for wheelbase being used, which means that a vehicle may run up to a maximum of 133 inch wheelbase.
18. 18. Wheels must be in fender wells as described above. Body may be stretched in middle to accompany this.
19. 19. The outside edge of the tire on the narrow axle must overlap the centerline of the tire on the wide axle by at least one inch.



E. Hitch
20. 20. Truck must have floor or bed cover.
21. 21. Truck may compete without tailgate or rear door(s) for greater hook point visibility.
22. 22. No portion of truck may interfere with sled, chain or hook during pull or while being hooked or unhooked.
23. 23. An area 5 inches wide and 12 inches high immediately above the drawbar must be free of all obstructions (including weights, wheelie bars and second drawbars) for ease of hooking and unhooking.
a. a.If body extends more than 12 inches behind point of hook, the open area must be 18 inches above drawbar and 24 inches wide at rear most point of body.
24. 24. Vehicle must have tow hitch on front of vehicle.
a. a.It can extend no more than 6 inches ahead of the farthermost front
portion of the vehicle.
b. b. It will not be counted when measuring length of vehicle.
c. c.It must have a 3 ½ inch diameter hold, positioned horizontally.
d. d. It must be strong enough to push or pull the vehicle at its heaviest weight.
e. e.It is to be used only for pushing or pulling the vehicle.
25. 25. From point of hitch to center of rear axle shall be no less than 36% of truck
Wheelbase, i.e., 134 inch wheel base equals 48.24 inch hitch length. Hitch heights to be 26 inches, before, during and after pull. Hitch must also adhere to general and safety rules. Hitch is to be no more than 6 inches from hitching point. No drawbars greater than the angle of the sled chain.
(acceptable angle: 0 degrees to maximum 33 degrees.

F. Safety
1. Vehicle must have a complete firewall (no holes except for controls).
2. Vehicles that do not have working doors must carry an onboard halon fire system
with a minimum of 3 nozzles located within the driver’s compartment/engine
compartment.
3. Flip-top or funny car type vehicles must have body in lowered position before
vehicle may be moved under its own power.
4. Flip-top type bodies must have a safety lock to hold up the body.
5. Body may be raised to start engine and may stay in raised position while engine
is running as long as vehicle is not in motion.
6. 6. Operator’s compartment:
a. a. No fuel tanks, fuel pressure gauges, fuel pumps and/or fuel lines are allowed in the operator’s compartment.
b. b. If the fuel tank is located behind the driver, a fire barrier is required from the rear of the driver’s seat. (0.060 inch aluminum or steel is acceptable fire barrier material).

G. Tires
Maximum tire size to be 112 inch circumference, when inflated to 30 psi with original
bar, not to exceed 17 inches in width before cutting.