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if you want more airflow then you should grab up one of these Speedmaster X-Stream air flow top plates
They're made from quality materials
28 & 31 spline axles:Requires bearing PCE231
Speedmaster engine hardware are premium-grade
The precise design of these Speedmaster carburetor spacers provides a smooth transition of fuel from the carburetor to the intake manifold
Pontiac 455 OEM 2 Bolt to 4 Bolt Straight Billet Steel Main Caps if you want more airflowSpeedmaster billet main caps are precision CNC machined from superior quality 1025 billet steel. These extreme main cap sets consist of the center three caps. Speedmaster billet main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores, and increasing the cap's resistance to closing up under high loads.
