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R07 Cylinder Heads Comparison View

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The R07 head (left) is a rare casting, hence the smaller-looking intake ports. The SB2.2 (right) has extra room, which creates a lot of opportunities for creative engine builders to make power.
R07 Racing Cylinder Heads - New Power For Chevrolet

 The R07 head (left) is a rare casting, hence the smaller-looking intake ports. The SB2.2 (right) has extra room, which creates a lot of opportunities for creative engine builders to make power.  View Related Article

 

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