GSC Power-Division Stainless Steel Exhaust Valves 32mm 2002-2014 WRX / 2004-2021 STI FEATURED_2015-2021STI this exhaust system is a

this exhaust system is a top choice for WRX STI owners looking to upgrade their sound and power

Enhanced Driving Feel: Provides a more connected and responsive throttle feel for spirited driving and daily use

3 40mm Offset

this Cusco bushing is a smart

GSC Power-Division Stainless Steel Exhaust Valves 32mm 2002-2014 WRX / 2004-2021 STI FEATURED_2015-2021STI this exhaust system is aGSC set out to create the best performance, longest lasting Subaru intake valves available to the aftermarket. Using advanced 3D design and simulation programs GSC created a stronger and higher flowing valve head design. GSC flow tests prototype valve heads to specific applications, making sure they have the highest flowing valve head available on the market today. The materials used by GSC have less valve distortion at the face than any of the tested