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Speedmaster Aluminum Roller Rockers are extruded from 6061 T6 Aluminum
and a removable center section for cam adjustment or replacement
The outer case is made from 8620 Chrome-Nickel-Moly steel and the case hardened for long life
This is our most popular manifold and is showing up on many performance street machines and street rods
Chevy LS1 LS6 2.055" STD 8mm Stainless Steel Intake Valves Speedmaster Aluminum Roller Rockers areWhen it's time for valves, don't cut corners. Get genuine Speedmaster stainless steel valves. They're made from a tough, stainless steel alloy and are carefully designed to increase gas flow for more power. What's more, they have hardened stem tips for durability and are swirl polished.
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