Right now Im seeing 10lbs max boost on 88mm pulley 93 Octane since I installed stage1.5 s/c kit. This thread makes me wonder whether to switch to cats or leave the test pipes on before I get the car tuned in 3 weeks.
I might switch back to hfcs that I still have and see if theres any difference.
Baer, do you think I would see more boost with hfc/cats?