Used Racing Cylinder Heads
The Roush Yates D3 Cylinder head will bolt on to any small block Windsor style engine block but are not recommended on blocks with a bore size smaller than 4.090” (Ford Racing R452, Boss351, Dart and others with 4.090 or greater bore capacity). The valve sizes for these heads are 2.150” on the intake and 1.650 on the exhaust. Because of the unique valve angle, special pistons have to be used to ensure proper piston to valve clearance. These heads were not designed to be used with a stud mounted rocker so special shaft mounted rocker arms must be used (Heads use Roush Yates Rocker Stand Pattern) and sets are available from several different manufacturers. Depending on your block application several different intake manifolds are available based on deck size (9.0, 9.2, 9.5). A variety of valve covers will work on these heads but have to be checked for rocker arm clearance. These heads are a great way to make some really good horsepower but are only available while supplies last.
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