Well...I didn't mean junk products...but most stage kits like 3800 performance or the ones thrasher used to sell were just a T-Stat, 3.4" or 3.2" Pulley, CAI, and Catback...not good things to buy for sure.
You might be able to get away with the 3.5" without a tune if you scanned for knock but it's one of those toss-up deals becuase some cars could handle it...and other couldn't ya know? PCM wise...get one from 3800 Performance.com as they are still using the original DHP 1.0 PCM bin files...best 3.4"-ish and supporting mod mail-order tune you can get. I had a base DHP PCM and ran a 13.8 @ 98 in the 1/4 in 80* humid MO weather with 1.84 Rollers, 3.5" and 3" Exhaust with PEM's and a DP. That's just IMO though
