not yet, your boarder line maxing them out. 42's make it run so much better anyways. better spray pattern. and you can run down to a 2.8 on them easy. if you can beat this kr.
make sure nothings hitting, dp to sway bar. wheres the o2 sensor? is it hitting the fire wall maybe? what plugs and gap you running?
I'm running 103's at .40 originally had .52 same results. Dp to sway bar is good. O2 sensor is in the normal area on sd headers and the firewall is punched out. Motor and trans mounts are all Polly.
02 GTP - Cartuning Turbo Kit VS67 3" DP, 80#INJ, N*,LQ4 MAF, Custom Cam, Roller Rockers, 130#, P&P Heads, Meth, AL103's, Corn fed, 522WHP on a mustang dyno, HP Tuners by me.