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CALL for "UNADVERTISED DISCOUNTED SPECIALS" The 380cc port volume is perfect for Top Sportsman, Top Dragster, Quick 16 and any other "Go Fast' eliminators. This head delivers all the airflow that a Big Inch Big Block can handle in a conventional siamese port configuration.
The intake ports are machined in a dedicated casting with brass tubes inserted in the head bolt columns between the intake runners to accommodate the extra width of the ports. These are the heads for a big-inch rat motor. - 2.300 x 1.800 Severe Duty stainless steel valves on assemblies
- Intake port is 1.758 wide x 2.520 high.
- 119cc combustion chambers
- Assemblies with Dual springs 1.625 OD, 270lbs @ 2.000 install height
- Assemblies with triple springs 1.650 OD, 330 lbs @ 2.000 install height
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Cams / Lifters /Timing Sets
On all complete assembly packages, it is very possible that the valve springs are not correct for your camshaft. All valve springs should be checked for compatibility to your camshaft. Severe wear of valve train components and severe engine damage could result from failure to do this. Check spring requirements before heads are installed on the engine. If in doubt please contact your camshaft manufacturer or USA Performance Parts. We do carry optional springs for all of your needs.
