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Chevy NASCAR Engine R07 Cylinder Head

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From the exhaust flange side of the cylinder head, you can see the mirror port design of the SB2 (below), as opposed to the alternating port design on the R07. The new design facilitates better flow and added heat dissipation.
Chevy R07 NASCAR Engine - The Future Is Now

 From the exhaust flange side of the cylinder head, you can see the mirror port design of the SB2 (below), as opposed to the alternating port design on the R07. The new design facilitates better flow and added heat dissipation.  View Related Article

 

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