Dont sound to shabby. I just bought some thrush's myself and im waiting for my buddy to weld them on. Is it just me or does everything sound like a FART CAN on these. LOL
Hey snow99dohc i see you have a zzp PCM do you still have a REV-limiter? or do most do that?
They raise the shift points and remove the top speed limiter if thats what you mean.
2003 Pontiac Gran Prix GTP-Thrasher CAI, 180 degree t-stat, AL 104's, ZZP/PT Pcm, ZZP Stg 1 HV TB, ZZP headers, 3'' custom catback, magnaflow mufflers, 3.4''