5/16 Hi-Tech Pushrod - 7.850 Long

The COMP Cams 5/16 Hi-Tech Pushrod, 7.850 inches long (part number 8412-1), is a precision engine component engineered for high-performance marine and automotive applications where reliable valve actuation under extreme conditions is non-negotiable. Built from chromoly steel with a 0.105-inch thick wall, this pushrod delivers the strength and dimensional stability required in high-RPM engines where standard components would fail. The hi-tech construction minimizes deflection and harmonics, ensuring consistent valve timing across the entire operating range—critical for engines running offshore or in demanding duty cycles.

At 7.850 inches long with a 5/16-inch diameter, this pushrod is designed to work within tight tolerance stackups common to small-block and mid-range marine engines. The chromoly material resists stretch and fatigue better than standard steel, maintaining length stability as cylinder pressures spike during acceleration and heavy load cycles. The 0.105-inch wall thickness represents the optimal balance between weight reduction and structural rigidity—thin enough to minimize inertial losses but thick enough to withstand the shock loads encountered during high-lift, high-duration cam profiles. Proper length ensures correct pushrod geometry, preventing binding or excessive clearance that can cause erratic valve control.

Marine engines operating at sustained RPM and boat owners upgrading to aggressive cam profiles rely on COMP Cams pushrods to maintain precise valve actuation under salt-air corrosion exposure and thermal cycling. Engine builders tuning small-block powerplants for maximum efficiency also specify this component to eliminate a common source of valve-timing inconsistency. A single failed or stretched pushrod can cause radical valve timing changes, loss of compression, and catastrophic engine damage, making pushrod selection a non-negotiable part of engine assembly.

COMP Cams pushrods are sold individually, allowing builders and technicians to replace worn components one at a time or assemble complete sets. Verify length and diameter compatibility with your specific block, head, and rocker-arm configuration before purchase to ensure proper geometry and clearance in your application.