Manley 26140 Pro Series Valve Spring Titanium Retainer Kit Sport Compact

The Manley 26140 Pro Series Spring and Retainer Kit is a precisely matched valve train set engineered for high-revving Sport Compact engine applications. Combining performance valve springs with lightweight titanium retainers, this kit provides the valve control needed to support aggressive aftermarket camshafts and elevated engine speeds.

Pro Series Valve Springs

Manley's Sport Compact valve springs are built specifically to handle the demands of modern aftermarket camshafts. Each spring is wound from super-clean, high-tensile-strength chrome silicon steel alloy and undergoes classified heat treatment and shot peen processing to maximize fatigue life and minimize load loss over time.

Aerospace-Grade Titanium Retainers

The included titanium retainers are machined on dual-spindle CNC equipment to extremely tight tolerances, producing a precision jewel-like finish. Manley uses only certified, heat-treated aerospace-grade titanium bar stock for these components.

Key Features:

• Matched valve spring and titanium retainer kit — all components sized and tuned to work together
• Chrome silicon high-tensile-strength steel valve springs for superior fatigue resistance
• Shot peen and heat-treated springs for extended service life and reduced load loss
• Aerospace-grade titanium retainers machined to exacting CNC tolerances
• Retainer lash angles held to within 6 minutes (0.1°) of spec
• Installed heights controlled to within ±0.005"
• Lightweight titanium mass reduces valvetrain inertia, enabling higher RPM without valve float
• Designed for high-revving Sport Compact engine applications

Upgrading to the Manley 26140 Pro Series kit allows tuners to safely push engine speeds higher while maintaining reliable valve control. The reduced reciprocating mass of the titanium retainers directly delays the start of valve float, making this kit an essential upgrade for any performance Sport Compact build.