SBC Shaft Rocker Arm Kit w/Bowtie 18 Deg. Heads

The T AND D MACHINE SBC Shaft Rocker Arm Kit with Bowtie 18 Degree Heads is designed for serious small-block Chevrolet builders who prioritize reliability and precision in their valvetrain assembly. This shaft rocker arm system is a notable upgrade over traditional stud-mount designs, providing superior geometry control and consistent valve action across the entire RPM range. Whether you're constructing a street performance engine, weekend racer, or high-horsepower setup, this kit meets the critical need for accurate rocker arm ratio and geometry with your 18-degree cylinder heads.

Shaft-mounted rocker arms eliminate the deflection and wear common in stamped rocker designs by distributing load across a solid steel shaft rather than individual studs. T AND D MACHINE's design offers both 160 and 155 ratio configurations, delivering optimized valve lift and duration characteristics tailored for 18-degree head applications where port angle and pushrod geometry require precision. The bowtie designation confirms compatibility with the iconic small-block Chevrolet architecture, ensuring a perfect fit for your engine.

This rocker arm kit is ideal for engine builders and enthusiasts looking to upgrade their performance. The robust construction ensures durability under sustained high-RPM operation and aggressive valve spring pressures. With tight material quality and machining tolerances, this kit enables predictable valve timing and lash management, which are critical for engine longevity and performance consistency.