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Mazworx SR20 Billet Main Caps
Add strength to your SR block with our SR20 Billet Main Caps. Caps are machined from pure 4140 chromoly steel.
New Mazworx SR20 Billet Main caps accept standard size main studs.
The Block does not need to be machined to accept 1/2" main studs. A line bore/hone will be needed once these are installed.
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