5/16in Moly Pushrod - 8.150in Long

The 5/16in Moly Pushrod - 8.150in Long from MANLEY is a precision-engineered valve train component designed for high-performance engine builds and competition applications. Pushrods are critical links in overhead valve (OV) and pushrod-style engine architectures, transmitting precise motion from the camshaft and lifters directly to the rocker arms that actuate your intake and exhaust valves. This particular model serves builders and mechanics who demand reliability under extreme RPM conditions, whether you're assembling a street performance engine, circle-track racer, or restomod that requires OEM-specification or upgrade-level valve train geometry.

MANLEY's 5/16-inch diameter chromoly pushrod features a 0.080-inch thick wall construction and swedged ends, delivering superior strength-to-weight ratio compared to standard steel alternatives. The 8.150-inch length is precisely specified for proper valve lift, rocker arm geometry, and lifter preload, ensuring consistent valve timing and preventing binding or misalignment during operation. Chromoly (4130 chromium-molybdenum alloy) material exhibits exceptional fatigue resistance and maintains rigidity under sustained high-RPM stress, critical for engines running elevated lift cams or aggressive timing curves. The swedged end design provides smooth, interference-fit contact at both the lifter and rocker arm, reducing stress concentration and extending component life in demanding applications.

This pushrod is ideal for mechanics and engine builders working on small-block and mid-displacement applications requiring OEM or performance-spec pushrods with enhanced durability. Proper installation demands careful measurement of valve lash or preload, as incorrect length or seating will cause valve train noise, improper valve events, and potential component failure. Always verify compatibility with your specific engine platform, lifter type, and rocker arm design before ordering; consult your engine's technical manual or dyno sheet for exact pushrod length and diameter requirements. The lightweight construction of this MANLEY piece reduces inertial mass in the valve train, allowing faster valve events and improved engine responsiveness at higher RPM bands.