Rev 9 vs K-Tuned Exhaust 8th Gen Civic Si (2006-2011)
2009 Civic Si FG2:
Rev9 (Full Race knockoff) 3" Cat-back exhaust
Rick Spec'd 3.5 inch intake
Skunk2 Alpha Header
J35 Throttle Body
Flashpro Dyno Tuned
2008 Civic Si FA5
K-Tuned 3" Cat-back exhaust
Custom intake
PLM Header
Flashpro Dyno Tuned
