| | disc brake calipers billet-4 billet-6 2k1 2k1 12 harrison ... billet brake calipers harrison engineering was back in 1986 ... and develop a multi-piston aftermarket caliper for harley-davidson motorcycles each ... fully progressive 4 or 6 piston caliper is precisely cnc machined from ... internal tolerances to a minimum the caliper pistons are machined from special low ... expansion aluminum alloy caliper pistons have a hard anodized finish ... steel for maximum performance the calipers have one pad for each piston harrison ... than any two pad or differential bore calipers it is also especially beneficial in wet ... the disc that removes the effect of the calipers skating on the disc and then braking ... becomes dry they are truly progressive calipers with a direct and sensitive relation ...
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