Tech Tips

The fastest way to identify T&D rocker arms is the shaft diameter and adjuster screw size. While most other shaft rocker brands use 3/8″ (.375) adjusters, the majority of T&D rocker arm’s will be a larger 5/8″ (.625) – 7/16″ (.4375) diameter – less applications where valve cover clearance is a factor.

Valvetrain technology has mirrored the advancements in cylinder heads to help them function better, and rocker arms are a big part of this. Rocker arm offset is very important and it ensures the valvetrain will work as it should

The fundamental shaft rocker uses a solid shaft, two mounting points, and a solid rocker arm without the need of a stud mounted through the centre; racers can experience benefits in strength and longevity at horsepower levels just 10- to 20-percent above stock.