Mazworx SR20 Billet Main Caps with 1/2" Studs

Mazworx SR20 Billet Main Caps with 1/2" Studs (91100)

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Our SR20 billet caps are machined from pure 4140 chromoly steel. Engine will need to be machined to accept the new 1/2" main studs and a line bore/hone will be needed once these are installed. Instructions ...
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