Conical Valve Spring Kit with Titanium Retainers 75LBS 37mm SuperTech for BMW B58B30

Conical Valve Spring Kit with Titanium Retainers for BMW B58B30

Our Conical Valve Spring Kit with Titanium Retainers for a BMW B58B30 is built for BMW B58B30 applications—engineered for reliable valve control, RPM stability, and long-term durability.

Conical valve springs taper from base to top to significantly reduce retainer/spring mass, improving harmonic control and valvetrain stability at high RPM.

Supertech valve springs are manufactured from premium Chrome Silicon alloys and heat-treated for fatigue resistance, while the included titanium retainers reduce valvetrain mass to improve control at higher engine speeds.

Features

• Conical spring design reduces mass for improved RPM capability
• Titanium retainers for lightweight, high-strength valvetrain support
• Enhanced harmonic control for stable high-speed valve motion
• Matched spring set for consistent pressures and performance
• CNC-machined components for accurate fit and reliability

Benefits

• Maximum RPM stability through reduced valvetrain mass
• Improved control for aggressive cam profiles and track use
• Reduced valve float risk under high-speed conditions
• More durable valvetrain operation under stress
• Race-proven performance characteristics

Specs

• Coil Bind: 23.20mm
• Rate: 7.8lbs/mm
• Retainer: ret-bmb48/te ; ret-bmb48/ti
• Retainer Qty: 8 ; 8
• Seat Locator: seat-bm48/t1
• Seat Locator Qty: 24
• Kit Spring: spr-fe20be
• Kit Spring Qty: 24
• Safe Rpm Limit: 8000
• Max Lift: 12.20mm
• Open Pressure: 155lbs @ 10.00mm
• Seat Pressure: 75lbs @ 37.00mm
• Inner Spring Id: 14.20mm
• Inner Spring Od: 21mm
• Outer Spring Id: 17.60mm
• Outer Spring Od: 24.40mm

Engines

• BMW B58B30

These images are representative, actual product images may differ.