The rocker body is machined out of the high grade aircraft alloy and roller tips have been precision machined. The products come in both 1:7 and 1:8 ratios and use a full compliment high quality Torrington bearing set. The Ultra-lite shaft rocker has 50% less nose weight of other shaft roller rockers offerings, fitting under the standard rocker covers with no further machining required. With valuable input from leading LS1 cylinder head manufacturers in the USA, Yella Terra engineers have worked in redesigning the YT Twin shaft rockers to withstand high RPMs and address valve control issues under extreme conditions.
This new “proprietary lightweight design” is better suited to performance hydraulic roller and mild solid roller applications. These will fit all Trick Flow cathedral port heads.The latest offering from Yella Terra is the new Ultralite LS1 twin shaft roller rocker series for late model Corvettes, Pontiac GTOs, F-bodies, and GM trucks.Īfter two years of R&D, testing and trials, the company has developed the Ultralite range that suits high performance applications. All of these benefits are available to you at the very reasonable price of $309.99! The new BTR shaft rocker kit is ready for assembly using your existing stock rockers. During the development of this system, both aluminum and steel stands were tested - steel reigned supreme.
Each pair of rockers has five fasteners mounting them to the rocker stand compared to the traditional single bolt per rocker configuration. The shafts are made from genuine 52100 bearing steel. The shaft rocker system consists of a billet steel stand equipped with four shafts per cylinder head, fasteners and bearings. This kit features technology typically only found in high-end shaft rocker systems. The new BTR shaft rocker system significantly reduces that deflection thereby improving performance and durability. Performance-minded engine builders know there is an inherent issue with valve train deflection when using stock rocker arm mounting in Chevrolet Gen III-IV-cylinder heads. Introducing the new BTR Shaft Rocker Kit – The Next Step in the Evolution of LS Rocker Arm Trunnion Kits Before assembly, please check fitment with your aftermarket cylinder head
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