Speedmaster PCE281.1740 188cc 77cc Alu. Bare Cyl Head for OM 400 425 455

Oldsmobile 400 425 455 188cc 77cc Aluminum Bare Cylinder Head All Speedmaster 18deg. Oldsmobile heads are available with OEM sparkplug location. Standard valve sizes are 2.072 in. Intake and 1.680 in. Exhaust. INTAKE GASKETS: _x000D_
Our heads are manufactured with both the conventional intake manifolds. _x000D_
PCE349.1011 _x000D_
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EXHAUST GASKETS: _x000D_
We recomend the use of our Exhaust gaskets, PCE355.1001, on our 18 degree heads. _x000D_
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PUSH RODS: _x000D_
Our aluminum 18deg. heads typically use +.100" (longer than stock) pushrods. Depending on the components used, it maybe that possible that you may need pushrods shorter or longer than that so we recommend that you use an adjustable pushrod to dial in your rocker geometry and order pushrods to match. Great throttle response and top-end horsepower Highly efficient ports and state-of-the-art combustion chambers shapes for improved performance throughout the rpm range