Product Description
BMW Conical Spring Kit with Steel Retainers - Supertech SPRK-FE20N54-BE-2
Our Conical Valve Spring Kit with Steel Retainers for a BMW S55 Turbo is built for BMW S55 Turbo 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
Measurements:
- Spring Base O.D.: 24.4mm
- Spring Base I.D.: 17.6mm
- Spring Top O.D.: 21mm
- Spring Top I.D.: 14.2mm
- Seat Pressure (lbs@mm): 90 @ 36.5
- Open Lift (lbs@mm): 176 @ 10
- Max Net Lift: 12mm
- Coil Bind: 23.2mm
- Rate: 8.6 lbs/mm
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
Located in San Jose, California in the heart of Silicon Valley, Supertech was born from the same fertile ground as many other companies in this area utilizingcutting edge technology to fuel growth.
Supertech fuses this technology with passionate people and over 30 years of experience in creating the highest performance valves and valve train components available.
Supertech provides the racing market with superior valves and valve train components for virtually every type of racing. Whether it’s Drag Racing, Rally, Road Racing or any other type of motorsport, Supertech is sure to have the perfect performance solution for your application. If not, we are always willing to work with you to custom manufacture the solution that is just right for you.
