The Wilwood 160-8402 is a 14-inch right-hand (passenger-side) rotor from the SV-GT family, a directional-vane design built on the 72-vane layout and Spec-37 iron alloy named in its part designation. Wilwood's own rotor catalog lists Spec-37 iron across several GT-series rotors with a 12 x 8.75-inch bolt circle, so this part belongs to the same wide-bolt-circle big-brake family. Compared with a stock rotor, a larger-diameter rotor gives the caliper more swept area and more thermal mass to absorb heat, which helps brakes stay consistent through repeated hard stops on track or in hard mountain driving. Buyers comparing it with cheaper aftermarket blanks should look at the alloy and the vane geometry, since those drive heat management more than the price tag does.
Before ordering, confirm the hub, hat, and caliper clearance for your application, because the bolt circle and rotor width have to match your existing hardware exactly. Search terms enthusiasts use for this part include 14 inch passenger side Wilwood rotor, 12 on 8.75 big brake rotor, Spec-37 iron directional vane rotor, 72 vane SV-GT rotor, and Wilwood 160-8402 replacement. Because no manufacturer install sheet was located for this part number, plan on checking runout and rotor thickness against the manufacturer's specifications and torquing lug nuts to the vehicle's own spec.
