Designed for quick, easy installation of headers and heat-treated for extra strength. The special washer faced, smaller-than-standard hex head is ideal for tight spaces. These bolts are Grade 5 with a 7/16 hex head and a protective black finish, except where noted. 5/16"-18 x 3/4"fits 340-360 Mopar & Hooker headers with adapter plates. (14/set).
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