Power-Division Single Valve Spring Kit

The GSC Power-Division Single Cylindrical Valve Spring Kit is engineered for Subaru 2015+ WRX, BRZ, Scion FRS, and Toyota FT86 vehicles utilizing the 2.0L NA boxer engine. This kit is an excellent upgrade for boosted applications or naturally aspirated engines that demand higher rev capabilities and improved spring performance at an accessible price point. The springs are nano-peened and precisely batched according to seat pressure to meet GSC's specifications, ensuring consistent performance. The lightweight titanium retainers are CNC machined to exacting tolerances, offering superior repeatability and maintaining consistent seat pressure across the cylinder head for enhanced reliability and performance. Key specifications include a maximum RPM of 8,200 RPM and a maximum boost rating of 20 psi. The seat pressure is rated at 89 lbs for intake and 88 lbs for exhaust at an install height of 1.279" and 1.283", respectively. At 0.846" (intake) and 0.850" (exhaust), the open pressure is 182 lbs and 181 lbs, respectively, with a maximum valve lift of 0.433". The coil bind height is 0.782 inches. This valve spring kit is compatible with a range of Subaru, Scion, and Toyota models, specifically the 2015+ Subaru WRX, 2013+ Subaru BRZ, 2013+ Scion FR-S, and 2017+ Toyota 86. It's recommended to check your specific valve spring install heights using the provided calculator link.