1.486in Outer Valve Spring

The 1.486in Outer Valve Spring from COMP CAMS (MPN 26911-1) is a precision-engineered single valve spring designed for high-performance engine builds where reliable valve control and durability are non-negotiable. Built for mechanics and enthusiasts tackling serious engine modifications—from naturally aspirated performance upgrades to forced induction applications—this spring maintains consistent lift and seating characteristics across demanding RPM ranges. Whether you're rebuilding a street engine or preparing a track-focused powerplant, this outer spring works in tandem with a damper or inner spring assembly to manage valve motion with precision.

Featuring a robust 410 lb/in spring rate, this component resists coil bind at just 1.140 inches, a critical specification that prevents spring collapse during maximum valve lift and protects against catastrophic engine failure. The 1.486-inch outer diameter accommodates OEM and aftermarket cylinder head designs while its finely tuned rate ensures proper valve closure without chatter, float, or loss of valve control at elevated RPMs. COMP CAMS' manufacturing standards guarantee consistent wire diameter, preload, and material composition—factors that directly impact engine reliability and longevity. This single spring weighs only 0.27 lbs, minimizing reciprocating mass while delivering the stiffness needed for aggressive cam profiles.

Technicians and engine builders rely on 1.486in Outer Valve Springs for applications requiring OEM replacement or performance-tier upgrades across a wide range of domestic and import platforms. Installation pairs this outer spring with an appropriately matched inner spring or damper to achieve target combined spring rate and control valve dynamics across the entire power band. Verify compatibility with your specific cylinder head bore diameter and cam lift specifications before ordering. Proper installation, including correct seating and preload verification, ensures maximum component lifespan and engine stability.