The latest offer from Yella Terra is the new “Ultra-lite” LS1 twin
shaft roller rocker series for late model Corvettes, Pontiac GTOs,
Monaros, Commodores, Vauxhalls and GM Luminas.
After two years of
R&D, testing and trials, the company has developed the Ultralite
range that suits high performance applications. This new “proprietary
lightweight design”. is better suited to performance hydraulic roller
and mild solid roller applications. 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.
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. The products come in both 1:7 and 1:8 ratios
and use a full compliment high quality Torrington bearing set. The
rocker body is machined out of the high grade aircraft alloy and roller
tips have been precision machined. The rocker arms have been balanced to
withstand the aggressive loadings at the high RPMS. 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.
Yella
Terra Roller Rockers have proven to be so reliable and durable since
1983, with the ultimate in design and proven by official Holden racing
teams such as NASCAR AUSCAR and Commodore cup to give more power and
reliability than other products.
The strongest aluminium rocker
arms in the world with deflection and bend tests proving their aircraft
grade extruded aluminium arms superior to rival aluminium and stainless
steel arms. They are the ultimate rocker arm for use in high revving
street engines and most race applications.
Premium quality Yella
Terra extruded alumiunum roller rockers have never let a competitor
down at our high speed proving grounds (Calder Park Thunderdome), where
Holden and Ford Auscars required to run our roller rockers having
battled in racing at an average speed of over 200km for an estimated
100,000 laps. The rockers ran for over 170,000 km at between 5000-6500
rpm.
FREE SHIPPING!