Are you looking for a head bolt reducer bushing for your Trick Flow® heads? Then you need a set of these Trick Flow® head bolt bushings. If your block uses a smaller diameter bolt than your head does, then one of these is what you need.

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ARP Header Bolts, 12-Point Head, 20mm UHL, 3/8 in. Wrench, Stainless Steel, Polished, For Chevrolet, LS Engine, Set of 12

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