Wilwood's unmatched performance is combined with classic, high tech styling in the ultimate kit for street rods, muscle cars, hot rods, and heavy weight drag cars. These systems stop hard, withstand severe heat, and can save as much as 35 lbs of unsprung and rotating weight over OEM components. Polished caliper kits are also available to catch the eye and win the favor of the most discriminating enthusiasts. Each hub is drilled for 5x4-1/2" and 5x4-3/4" bolt pattern. Set of ten 1/2"-20 NF Grade 8 studs included.