My mods are as follows: 3"downpipe, 3" test pipe, 3" RS-R exmag II catback exhaust, Modified Turbo (stock ct-26 malfunctioning wastegate opens at 12 psi) :) , HKS SSQV BOV, and a ACT 2100 clutch with street disc. i was running on 92 octane pump gas with 12 psi and 120,000 miles.