Manley 26175K Pro Series Valve Spring and Titanium Retainer Kit

The Manley Pro Series Spring and Retainer Kit is a precision-matched performance valve train upgrade designed for high-revving sport compact engines. This complete kit pairs premium chrome silicon valve springs with lightweight titanium retainers for superior valve control at elevated RPMs.

Performance Valve Springs:

• Constructed from super clean chrome silicon high tensile strength steel alloy
• Engineered to handle aggressive aftermarket camshaft profiles
• Advanced heat treatment and shot peening process for maximum fatigue life
• Maintains consistent pressure with minimal load loss over time
• Prevents valve float in high-RPM sport compact applications

CNC-Machined Titanium Retainers:

• Manufactured from certified aerospace-grade titanium bar stock
• Dual-spindle CNC machining ensures exacting tolerances and jewel-like finish
• Retainer angles held to within 6 arc minutes (0.1 degree tolerance)
• Installed heights held to within 0.005 inch
• Reduced mass enables higher engine speeds without sacrificing reliability

This matched spring and retainer combination delivers the precise valve control needed for modified sport compact engines, allowing tuners to safely achieve higher RPM ranges while maintaining valve train stability and long-term durability.