Spider Dimension
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This category groups Extreme Cam products by spider dimension, the spider diameter that sets the s-cam bore size. You’ll find enclosure tubes and s-cam bushing kits ranging from 1-7/8″ standard bores through oversized and triple oversized sizes. Use it to match the right bore to a worn or replacement heavy-duty trailer brake camshaft.
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Extreme Manufacturing stands behind our products. We offer a 2-year full warranty against manufacturing defects. You can also return your product(s) for a full refund of your purchase price within 90 days for any reason. We cannot refund shipping costs. View Details
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