Ideal for use in race applications, our wider 10 degree angle locks better distribute increasing spring loads over the retainer more than typicaly 7 degree...
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SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 381cid 4.165 x 1.125CH, 3.500stroke,6.125rod,0.927pin,-8.9cc,450g,12.7CR, 2618.