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Will not directly plug into GM column but can be connected by individually connecting wires from harness to their respective circuits
Speedmaster Aluminum cylinder heads use our "Gravity Die Cast" process
Designed for LS applications or water pumps with threaded provision for water neck
You cannot over-shift and miss a gear with Speedmaster automatic shifter
These housings can be flipped 180 degrees for either a left or right outlet location
Pontiac 326 400 455 1.660" 11/32" Stainless Steel Exhaust Valves Will not directly plug intoWhen 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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