The Wilwood 160-8398 is a right-hand, 14-inch slotted brake rotor from the brand's GT 72 curved-vane line, cast from Spec-37 iron. Wilwood's GT & GTB 72 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures, and the manufacturer says that alloy resists distortion, warping, cracking, and wear. Against a stock disc, the real difference is the material: a heavier iron casting meant to hold its shape as heat builds during repeated hard stops, which matters most on track days and in hard-braking sessions. Search terms this part fits include Wilwood 160-8398 right hand rotor, 14x1.25 slotted iron rotor, 12 on 8.75 bolt pattern, and GT 72 curved vane Spec-37 rotor.
The plain finish is the bare iron version. The manufacturer also lists a black electro-coat variant under part number 160-8398-GTB, and the left-hand counterpart is 160-8399, so confirm the side and finish before ordering. Before installing, check the 12 x 8.75 in bolt circle and the 0.251 in mount hole size against your hub and hardware, since a mismatch here is the most common reason a rotor will not seat correctly.
Per the manufacturer, part 160-8398 is the right-hand (R/H) version. The manufacturer lists the left-hand counterpart as 160-8399, so match the side before ordering.
Yes. The manufacturer lists a black electro-coat option as 160-8398-GTB, which is otherwise the same GT Slotted right-hand rotor.
The manufacturer specifies a 12 x 8.75 inch bolt circle with a 0.251 inch mount hole size. Confirm these against your hub before installation.
