5/16 Magnum Pushrods - 8.500 Long

The 5/16 Magnum Pushrods - 8.500 Long from COMP CAMS are precision-engineered components designed for serious engine builders and high-performance enthusiasts who demand reliability under extreme operating conditions. Pushrods serve as the mechanical link between your camshaft and rocker arms, translating rotational cam motion into vertical valve actuation with zero slop or deflection. Whether you're building a stroker small-block, restoring a classic muscle car, or tuning a competition engine, selecting the correct pushrod diameter and length is critical to maintaining proper valve timing, reducing parasitic power loss, and ensuring long-term durability.

These magnum-series pushrods feature a 5/16-inch diameter specification, engineered for applications requiring reduced mass without sacrificing structural integrity—ideal for higher-RPM engines where lighter reciprocating weight translates to quicker throttle response and improved valve control. The 8.500-inch length accommodates modified cylinder head and block deck combinations common in stroker and big-displacement builds. COMP CAMS' manufacturing process ensures straightness within tight tolerances, minimizing valve lash variation across the RPM range and preventing the harmonics that plague inferior components. The smaller 5/16 diameter also reduces inertial loading on cam lobes and rocker arm geometry, allowing for more aggressive cam profiles without sacrificing valve seating reliability.

These pushrods excel in street/strip small-block Chevys, Fords, and Mopars where engine displacement has been increased beyond stock specifications or where custom head and block machining requires non-standard lengths. They're equally at home in vintage drag racing applications and modern restomod projects that demand period-correct functionality with measurable performance gains. Before ordering, verify your specific engine block and cylinder head combination, as pushrod length is non-negotiable for proper rocker arm geometry and valve train geometry. Installation requires baseline knowledge of valve lash adjustment and rocker arm preload—consult your engine builder or COMP CAMS documentation to ensure correct setup for maximum longevity and repeatable power output.