BoostLine 89-12 Cummins 5.9/6.7 Diesel 7.559in Connecting Rod Kit

These BoostLine connecting rods are forged from 4340 H-beam steel, a strong material chosen for its ability to handle the high cylinder pressures common in modified 5.9L and 6.7L Cummins engines. The 7.559-inch length is a specific design choice that can alter piston dwell time and improve engine breathing, especially when paired with other performance upgrades. This kit is built for owners who are pushing their diesel engines beyond stock capabilities and need components that can reliably handle the increased stress.

The H-beam design itself offers a solid balance of strength and weight, making these rods a popular choice for builds aiming for significant horsepower gains. Each rod is precision-machined to ensure consistent dimensions and proper fitment with your crankshaft and pistons. While these are a performance part, they are designed to be a direct replacement for the factory connecting rods, simplifying installation into your engine rebuild. You'll want to ensure you have the correct bearings and fasteners for your specific application, as these rods are sold as a kit without those items.

If you're rebuilding your top end or planning a performance overhaul for your 1989-2012 Cummins, this connecting rod kit from BoostLine is a well-built option. They are a solid choice for those looking to build a more robust and powerful diesel engine that can withstand the rigors of heavy use or competition.