FLI now offers complete Street and Race head porting services. We can use your OEM heads or you can purchase a new set from FLI. If FLI has a core set in stock, there will be a refundable deposit after inspection of customer's heads.
FLI Stage 1 mild street/race head porting includes bowl and port blending, radial seat cutting and back angle valve cutting.
FLI Stage 1 heads add about 17% more intake flow and 8% exhaust flow over stock U.S. WRX Non AVCS heads.
Stock U.S. WRX Non AVCS heads flow about 2% more intake and 4% more exhaust over stock U.S. AVCS STI heads.
Starting at $1499
