![]() Yella Terra Ultralight LS1/LS2 Rocker Set, Non-Adjustable, 1. The new Ultra-Lites will provide optimal results for LS series engines, provided the right valve springs and proper pushrod/valvetrain geometry is in place. The rocker arms have been balanced to withstand the aggressive loadings at the high RPMS. 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. Stock rockers are great, light weight rockers. Don't get too wrapped up in internet diagnostics, people forget to say how many miles they had on them, how much lift their cam had, were they set up right, etc. 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. There are also Some Yella Terra's breaking as well. This new “proprietary lightweight design” is better suited to performance hydraulic roller and mild solid roller applications. 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. ![]()
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