its an 8 in fluidamper 15 to 1 j&e pistons mallory ignition eagle rods and crank. I also am a mud racer so if u dont mind me asking what gears do you run. I have a 488 in the rear with 44in tire and 456 front with a 40 in tire. So far I've had trouble gettong this motor to come up on rpm like thats too high of a gear. It runs 1 to 1 thru a chain drive. I havn't ran it with the nos yet just motor. Any help would be greatly appreciated