Chevy BBC 454 2.300" +100 11/32" Stainless Steel Intake Valves Speedmaster Aluminum Roller Rockers are

Speedmaster Aluminum Roller Rockers are extruded from 6061 T6 Aluminum

Speedmaster brackets are constructed from durable steel

Their single-idler design has CNC-machined components and they are easy to install

This is our top-of-the-line medium profile LowRise+ Series manifold

and other horizontal surfaces

Chevy BBC 454 2.300" +100 11/32" 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.