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Designed for 1-3/8 inch input shaft NV4500 5-speed transmissions
along with expansion and contraction
Automatic system shut down when panel is unplugged
Completing this great new lift system are a set of steel rear shock extensions
XDP ROCKER ARM SHAFTS FOR 2001-2019 GM 6.6L DURAMAX interior Designed for 1-3/8 inch inputThe XDP Rocker Arm Shafts XD385 are specially designed to minimize the common oiling issues in the 2001 2019 GM 6. 6L Duramax engines. From the factory, the oil supply to the rocker arm is shut off as the valve is opened. This lack of lubrication can cause excessive wear on your valvetrain and premature failures, especially in high performance applications. The XDP Shafts feature revised oil grooves that align with the oil hole in the bushing so you