Pit Stop USA is The Online Motorsports Superstore! T&D Machine Products offers the shaft mount Roller Rockers that have become the choice of racers everywhere. T&D Shaft Roller Rocker Arms extruded 2024 aluminum Rocker Arms are CNC-machined and have intricate oil galleries built in to direct oil from the pushrod to the shaft bearings and onto the roller tip. Adjuster screws are 7/16" and broached for a 3/16" socket to eliminate twisted Allen wrenches. Deep, case hardened 8620 steel shafts are tempered for strength. Optional .040" spring oiler holes spray directly onto the valve springs for extended spring life. T&D SportComp Shaft Roller Rockers offer high quality, affordable rocker sets reduce valve train weight and valve lash adjustments while increasing RPM potential. System eliminates stud girdles and provides better head bolt accessibility. Sets of 16 include all installation hardware. T&D Deluxe Pinion Depth Checker sets up rear ends quickly and correctly. Fixture sits in place of differential carrier to easily check pinion depth. Includes adapters for most popular domestic rear ends, Ford 8.8"/9", Chrysler 8-3/4", Dana 60 and GM 10/12-Bolt. We feature T& D Shaft Roller Rocker Arm Systems, T&D SportComp Shaft Roler Rockers and T&D Deluxe Pinion Depth Checkers at low everyday prices.