I've tried 3 downpipe/back exhausts last friday on a Dyno .... here are the results
Mod's :
7 psi boost
CAI Injen
FMIC Turbotech
Stock line
160.1Whp
156.7 Tq
Exhaust line made by muffler shop downpipe/back (suposed to be hi-flow , with cat , resonator , dynomax muffler)
162 Whp
158.5 Tq...