Manley 26150 Pro Series Sport Compact Valve Spring and Titanium Retainer Kit

The Manley 26150 Pro Series Spring and Retainer Kit is a precision-matched set engineered specifically for high-revving Sport Compact engine applications. Combining Manley's performance valve springs with aerospace-grade titanium retainers, this kit delivers the valve train control and reliability demanded by today's aggressive aftermarket camshaft profiles.

Pro Series Valve Springs

Manley Performance valve springs are purpose-built to handle the demands of modern Sport Compact camshafts. Constructed from super-clean chrome silicon high-tensile-strength steel alloy, each spring undergoes classified heat treatment and shot peen processing to maximize fatigue life and minimize load loss over time — ensuring consistent performance in high-RPM environments.

Aerospace-Grade Titanium Retainers

Manley titanium retainers are CNC-machined on dual-spindle equipment to exacting tolerances, producing a superior jewel-like finish. Manufactured from certified, heat-treated aerospace-grade titanium bar stock, these retainers offer an exceptional strength-to-weight ratio critical for high-RPM valve train stability.

Key Features:

• Matched spring and titanium retainer set for Sport Compact engines
• Chrome silicon high-tensile-strength steel alloy valve springs
• Classified heat treatment and shot peen processing for extended fatigue life
• Dual-spindle CNC-machined titanium retainers
• Retainer angles held to within 6 minutes (0.1°) of specification
• Installed heights held to within ±0.005"
• Aerospace-grade certified, heat-treated titanium bar stock
• Reduced valvetrain mass helps prevent valve float at high RPM

Titanium retainers are essential for high-RPM Sport Compact builds. Their reduced mass allows the engine to reach higher speeds while avoiding dangerous valve float — all without compromising durability or reliability.