GSC Steel Valve Spring and Titanium Retainer (EJ20, EJ25)
GSC cylindrical single valve spring kit for the Subaru turbo EJ WRX and STi. Made for the Suby owner that daily drives their hot rod and keeps the boost and revs down.
GSC Power-Division was started to fill the need for high-quality performance camshafts and valve train components for the Japanese sport compact cars of today. With little worthwhile offerings in the market, and a passion for quality and performance, GSC offers cutting-edge designed camshafts and valve train components that are lighter and handle the most extreme conditions of the turbo sport compact engine.