Gorilla Rocker Shafts - Stock Replacment - Twin Cam | Evolution Big Twin | XL FRAME AND CHASSIS_TRASK PERFORMANCE Improves performance and fuel economy

Improves performance and fuel economy

Manufacturer Part Number: 131-30-40048-06

The new S&S oil pumps are much less likely to be damaged by either

Long block engines : Engine assembly only

Gorilla Rocker Shafts - Stock Replacment - Twin Cam | Evolution Big Twin | XL FRAME AND CHASSIS_TRASK PERFORMANCE Improves performance and fuel economyProcision ground from 4140HT steel, gas nitrided and fianl surface treated Over double the strength of factory rocker shafts Recommended for all Twin Cam engines and especially for engines running higher lift camshafts and heavier valve spring pressures Made in the USA Manufacturer Part Number: 1235