Intermediate Shaft

The Melling Intermediate Shaft (IS-63) is a direct replacement oil pump drive shaft engineered for Mopar B-series and legendary 426 Hemi engines. As a critical component in your engine's oil circulation system, this shaft transmits rotational force from the camshaft to the oil pump, ensuring consistent pressure delivery to all bearing surfaces under load. Whether you're rebuilding a classic muscle car, restoring a vintage Mopar, or maintaining a high-performance street engine, a quality intermediate shaft is essential for reliable lubrication and engine longevity.

Melling manufactures this intermediate shaft from hardened steel with a durable black oxide finish, providing corrosion resistance and extended service life in demanding engine environments. The stock-length design (measuring 9.8 inches) ensures proper fitment and alignment with your camshaft and oil pump without modification. The 1.05-pound weight reflects the precision forging required to handle continuous rotational stress while maintaining tight tolerances—critical for smooth pump engagement and eliminating excessive wear on mating surfaces.

Mechanics and engine builders working on Mopar B-block and RB-block platforms will appreciate this shaft's direct compatibility without adapter requirements. It's an ideal choice during complete engine overhauls, oil pump replacements, or when addressing low oil pressure symptoms stemming from worn shaft-to-pump interface wear. Installation is straightforward during cam timing and oil pump assembly—simply align with the camshaft slot and secure the pump drive. For anyone serious about maintaining original performance specifications or ensuring reliable oil delivery in a freshly built engine, the Melling IS-63 represents a cost-effective, proven solution.