Manley Performance Subaru WRX/STi Valve Spring and Retainer Kit Part #26185

Description

Upgrade your Subaru WRX or STI with the Manley Performance Valve Spring and Retainer Kit, designed for high-performance and racing applications. Crafted from chrome-silicon alloy, these valve springs offer exceptional fatigue resistance and high-tensile strength, ensuring reliable valve control even at extreme RPMs. The kit includes matched valve springs and aerospace-grade titanium retainers CNC machined to exacting tolerances, providing durability and stability under aggressive engine conditions. These components are engineered to handle aftermarket camshafts and high lift settings, making them ideal for enthusiasts seeking to maximize engine performance and longevity.
The kit’s springs are rated for a maximum lift of .510 inches, supporting aggressive camshaft profiles while maintaining consistent performance. The titanium retainers are heat-treated for strength and lightweight benefits, reducing valve train oscillation and wear. Machined from premium quality heat-treated steel, the 7-inch valve locks complement the assembly, ensuring a secure fit and reliable operation. Designed to fit a wide range of Subaru Impreza models from 2002 to 2009, this kit is an excellent choice for engine builders aiming for increased RPM capabilities and durability.
Whether you’re building a race-ready engine or upgrading for enhanced daily performance, the Manley Subaru WRX/STi Valve Spring and Retainer Kit delivers precision engineering and high-quality materials to meet demanding performance standards. Proper installation of this kit can improve valve stability, reduce valve float, and contribute to overall engine efficiency and longevity. Backed by Manley’s reputation for performance and reliability, this kit is a valuable addition to your high-performance Subaru engine build.

Features:

• Includes matched valve springs, retainers, and locks (when part number ends in ‘K’) for a complete valvetrain upgrade

• Designed to handle aftermarket camshafts and up to 10,000 RPM for high-performance applications

• Made from chrome-silicon alloy for maximum durability, stability, and fatigue resistance

• CNC-machined aerospace-grade titanium retainers for lightweight strength and heat tolerance

• Supports maximum valve lift of .510 inches for aggressive camshaft profiles

Fitment:
Subaru Impreza WRX 2002
Subaru Impreza WRX 2003
Subaru Impreza WRX 2004
Subaru Impreza WRX 2005
Subaru Impreza WRX STI 2004
Subaru Impreza WRX STI 2005
Subaru Impreza WRX STI 2006
Subaru Impreza WRX STI 2007
Subaru Impreza WRX STI 2008
Subaru Impreza WRX STI 2009
Subaru Impreza WRX STI 2010
Subaru Impreza WRX STI 2011
Subaru Impreza WRX STI Limited 2007
Subaru Impreza WRX STI Limited 2011
Subaru Impreza WRX STI Special Edition 2010