Description:
STP Performance Parts - Racing Dual Valve Spring Kit for BMW M52 (24v)
Complete kit includes:
- 24 × Inner Valve Springs
- 24 × Outer Valve Springs
- 24 × 6 mm Chromoly Steel Retainers
- 24 × Inner Steel Valve Spring Locators (prevents spring damage on aluminum heads)
Specifications:
- Seat Pressure: 80 lbs @ 35.70 mm installed height
- Open Pressure: 220 lbs @ 12 mm lift
- Max Safe RPM: 8000+ (with correct geometry)
Full drop-in high-RPM upgrade for all BMW M52 non-VANOS and VANOS engines (M52B25/B28). Perfect for aggressive camshafts, big-valve heads, and track/race applications.
