EJ257 / EJ255 Valve Spring & Titanium Retainer Kit – Increased RPM & Boost

Upgrade your Subaru EJ257 or EJ255 engine with this Single Valve Spring & Titanium Retainer Kit. Increased spring pressure and reduced weight allow for higher RPM and boost levels without valve float. Features: High-quality, performance-designed valve springs Lightweight titanium retainers for reduced valvetrain mass Enables safe operation at higher RPMs Supports aggressive camshafts and increased boost pressure