[Chadillac2000]

Alright guys, when i first got evo316g i was getting alot of creep with my 3 inch dp and exhaust with no cat, so i got a cat and sure enough it cured my creep problem, but now i have an safc, datalogger, and FIC 660's and i was wondering i put my test pipe back on (which i heard will net a noticeable gain) will i get the same creep again even if i have my mbc set at 20+ psi all the time? thanks guys