yeah, what salmo said.. that way i could put in a 350 in my truck for 1800 for the motor, vs 2500 for a 262 V6... thats just for the motor, not install, or other parts.. but i cant do that, because they plug me in, and i would throw every code available, as i would have no computer running it.. and im willing to bet you, that a 350 that i could have built, will burn a hell of alot cleaner than a 4.3 with 118k on it, computer or not...