Skunk2 '06-'11 Civic Si Alpha Series Header WRX STI The FX1 Pro racing seat

The FX1 Pro racing seat features composite fiberglass technology

comes with 1 3/4″ & 13/16″ dual hex adapter

Coupe/Sedan SI

best fitting intake system netting +6whp and +8lbs-ft of torque

and increase the safety and drivability of your car by using Goodridge race proven

Skunk2 '06-'11 Civic Si Alpha Series Header WRX STI The FX1 Pro racing seatNote: Complement with a genuine Skunk2 MegaPower R Exhaust system for maximum exhaust flow and gain. Race applications only eliminates catalytic converter. Includes adapter flange, donut gasket, and exhaust hanger mounting bracket. O2 sensor bung thread pitch: M18 x 1. 5. *Not compatible with K24 bottom end swap*