Wilwood's Classic Series front disc brake kit Wilwood's Tri-Five Pro spindles. Tri-Five Pro Spindles fit 55-57 full size Chevrolet vehicles. A completely new kit design, featuring a large 11.50" x 1.00” rotor and hub assembly. Based on the Forged Dynalite-M caliper, these versatile kits are easily optioned to suit the braking requirements and style preferences for a daily driver or the most discriminating show enthusiast. Intended vehicle applications require no modifications for installation, and provide plenty of clearance inside popular aftermarket 15" (disc brake) wheels. FDL-M 1 piece kits can be used with either manual or power boost master cylinders. Kits are complete with calipers, rotors, brackets and hardware.