Borla XR-1 with a cutout
Would a QTP cutout after the y-pipe help? Keep in mind I have a reverse split cam. MY current understanding is that my XR-1 muffler flows pretty well... My last dyno run was 387 SAE, 395 uncorrected with the original SLP setup and a looser converter. I'd like to hit right at or near 400hp with the tighter converter and new exhaust.
Thanks!


