it does haul ass but i put a cold air intake and a cat back dual exaust too, they put the eltronic Tremic 5 speed in it so you can manual shift it by just slaping the shifter..... i think the chip alone will get ya at least 15 ponies, and on the 5.7 you can fuck with the tranny also but that box plugs into your diagnostics plug and allows you to program the shift and intake, thats a cool setup, they dont offer that for the 6.1 only the 5.7...... like some one said it adjusts the air fuel mixture, and from the factory they detune these engines, yours is a 5.7 hemi? mines a 6.1 hemi, my freind got the srt10 pickup its a vipor v-10 engine and trans in a 1500 body, and my 6.1 with pipes a intake and chip beats him, but a vipor with the same setup makes me look im standing still in a race?. they offer a whole kit for the hemis that would get 500+ ponies out of that 5.7 but if you need to use that for transportation i wouldnt do all that you may get 20,000k out of the engine.....at the dealer where i got my c300, the manager has one with a super charger on it and the bottom end redone and he's getting close to 600 horse out of a 6.1...its amazing the shit you can do to these dodge hemi motors, i raced a vette zo6 and i got the jump on him and he beat me by about 2 car lengths and i think there 0-60 in under 4 seconds so that gives ya an idea of how fast your hemi will go........