Manley Honda K20A/K20Z Valve Spring and Retainer Kit (w/o Valve Locks)

When you're building a high-performance K20A or K20Z engine for your 2006-2011 Honda Civic, getting the valvetrain right is critical. This Manley Performance Valve Spring and Retainer Kit is designed to give you the stability and precision needed for aggressive aftermarket camshafts and extreme RPMs. You'll receive a set of matched chrome-silicon alloy valve springs, which offer excellent fatigue resistance and high tensile strength, along with aerospace-grade titanium retainers that are CNC machined to exact specifications. This kit is specifically designed to work with aftermarket cams and can handle up to 10,000 RPM, ensuring your valvetrain stays controlled even under intense conditions.

Manley has taken the guesswork out of putting together a race-ready valvetrain. The chrome-silicon alloy springs are well-built for durability and consistent performance, even at high engine speeds. The titanium retainers are heat-treated and precisely machined, contributing to overall valvetrain stability. This kit is intended for use with aftermarket camshafts and is rated for operation up to 10,000 RPM, making it a solid choice for serious engine builds. Note that this specific part number, 26140, does not include valve locks.

For your 2006-2011 Honda Civic, this kit is a significant upgrade for any performance-oriented build. The included springs are part number 22140-16, and the titanium retainers are part number 23140-16. The maximum lift this kit is designed for is .540 inches. If you're rebuilding your top end for racing or high-performance street use, this Manley kit provides the robust components needed for reliable operation at high engine speeds.