Hooker catback vs. Stock SS Exhaust??
Hooker catback vs. Stock SS Exhaust?? 
You won't need to retune for a catback alone, the PCM will make the proper adjustments on it's own....
I've personally seen the Hooker catback make 18 rwhp on a stock A4 Z28. On my car, I went from the Loudmouth (no muffler at all) to the Hooker catback, the HP stayed the same and I gained 7 ft lbs of TQ....Going through the Hooker muffler..
josh
I've personally seen the Hooker catback make 18 rwhp on a stock A4 Z28. On my car, I went from the Loudmouth (no muffler at all) to the Hooker catback, the HP stayed the same and I gained 7 ft lbs of TQ....Going through the Hooker muffler..
josh
I am getting it tuned because I changed rear gears to 3:73 when my original axle self destructed last year. I want my speedo right and I would rather have a pro do tuning than buy a predator. I cannot find anyone locally(Minneapolis) that will change my speedo settings without charging for a tune. If anyone knows a cheap way to get my speedo accurate I may skip the tune for now and put my money into other things.
