So I have a 97 GTS and dynoed it about 5 months back, it was stock except for a muffler delete and K&N drop in filters....thats run 1 on the sheet. It was 72 Degree air according to the dyno readings.
Run 2 is 1 7/8 B&B Headers, Cat Deletes, B&B cat back, AccuFab TBs, smooth tubes, Roes big...