Butler Performance Inc. - Cylinder Heads / Top End Kits
One of the most important components to an engine's performance is cylinder heads. Butler Performance is the main source for stock and performance cylinder heads for your Pontiac.
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Complete top end packages to build more horsepower and torque for your Pontiac. We've taken the guesswork out and includes everything you need to swap those old factory heads, cam, intake, lifters and more.
Your engine will only make a much power as the amount of fuel and air that can get in. Butler CNC Ported cylinder heads takes Edelbrock castings and opens the ports up to a variety of sizes for...More Details »
These are aftermarket cylinder heads with what we call out of box port sizes from the Edelbrock and Speedmaster. These heads offer a vast improvement in flow over traditional cast iron Pontiac heads.
Want a custom cylinder head you can assemble yourself? This kit is for you. Includes all the high quality valvetrain parts found in Butler built heads. These kits come with all machining completed and ready to assemble.
Send us your Edelbrock heads for custom CNC porting. We can arrange to ship your heads to us where they will be inspected CNC ported using our Butler CNC Porting Process.
Bare 356-T6 Aluminum, 400+ cfm flow out of box, 50cc combustion chamber, 310cc intake port, Will accept up to 2.300 intakes, & 1.800 exhaust valves, Guides & seats included