Ferrea E11025 Titanium Valve Spring Retainer BMW - M50 M51 M52 M54 S50 S52

The Ferrea E11025 is a precision-engineered titanium valve spring retainer designed specifically for BMW 3 Series and other models equipped with M50, M51, M52, M54, S50, and S52 engines. This high-performance retainer is part of Ferrea's Pro CNC Series, built to withstand the demands of high-RPM racing and performance applications.

Key Features:

• Precision CNC machined from aerospace-grade titanium alloy
• Fully heat-treated for maximum strength and durability
• 40% lighter than conventional steel retainers for reduced valvetrain weight
• Finished to exact tolerances for optimal valve spring stability
• 7-degree lock angle design for secure keeper retention
• Compatible with 6mm valve stem diameter
• Outside diameter: 28.20mm, Inside diameter: 17.17mm

This titanium retainer provides the critical weight savings needed for valvetrain stability at high engine speeds, making it an essential upgrade for racing engines and aggressive street builds. The reduced rotating mass helps prevent valve float while maintaining precise valve control. Sold individually, allowing builders to purchase the exact quantity needed for their application.