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The BB-2 heads work well with a heavy car and smaller engine (427-468 cu in). The BB-2 has a 305 cc intake port and flows 320 cfm with the bowls blended and the intake ports matched. The combustion chambers are 119 cc or 115cc and are properly shaped for use with either methanol or gasoline, preventing detonation. Both heads may be purchased angle milled to 110 cc. For a flow chart click on Technical Information below.
The 26 degree valve angle is the same as stock GM Big Block heads. These cylinder heads accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600 higher than stock, and the valve cover rails are now raised to assure no oil leakage. These heads also are available with 1.645 OD triple springs All Bare Heads from Brodix DO NOT have valve jobs done or guides honed. |
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.
