Supertech Performance SPR-BMS65-BE1-40 Beehive Valve Spring Set - 40 Piece Kit for BMW S65/S85 Engines

The Supertech Performance SPR-BMS65-BE1-40 is a high-performance beehive valve spring set engineered for BMW S65 and S85 engines. This complete 40-piece kit is designed to work with factory retainers and valve locks, making it an ideal upgrade for engine builders seeking enhanced valvetrain performance without replacing additional components.

Technical Specifications:

• Seat Pressure: 77 lbs @ 40.10mm (1.58 inches)
• Open Pressure: 180 lbs @ 10.00mm lift
• Spring Rate: 10.3 lbs/mm
• Maximum Lift: 12.20mm (0.48 inches)
• Coil Bind: 27.00mm (1.06 inches)
• Spring Base Outer Diameter: 26.50mm (1.04 inches)
• Spring Base Inner Diameter: 21.60mm (0.85 inches)
• Spring Top Outer Diameter: 23.20mm (0.91 inches)
• Spring Top Inner Diameter: 18.70mm (0.74 inches)

Key Features:

• Beehive design reduces reciprocating mass for improved high-RPM performance
• Lower variable natural frequency rate provides superior stability
• Compatible with factory valve retainers and locks for cost-effective upgrade
• Precision-engineered for BMW S65 V8 and S85 V10 engines

Supertech Performance specializes in manufacturing high-quality valvetrain components for racing applications including drag racing, rally, road racing, and other motorsports. With over 30 years of experience, Supertech delivers precision-engineered solutions that enhance engine performance and reliability in demanding conditions.