Manley Subaru WRX/STI (EJ20/EJ25) Valve Springs (1.126/.640) *ONE SPRING*16.35

Engineered for today’s high-revving sport compact engines, Manley valve springs deliver exceptional durability, precise control, and consistent performance. Manufactured from premium alloys and designed for demanding turbocharged and naturally aspirated applications, they ensure reliable valvetrain stability at elevated RPM and boost levels.

• Revs up to 10,000 RPM with Manley titanium retainers
• Designed to handle aftermarket camshafts
• Wound from super clean alloy