The Wilwood 160-8396-BK is the right-hand rotor in the SRP drilled-and-slotted performance line. It is a vented rotor with a 14.00 in outside diameter and 1.25 in thickness, with a drilled and slotted surface. The manufacturer says it is cast from premium grade, Spec-37 heavy wall castings and is suitable for moderate temperature racing to street use. For sustained racing, the manufacturer points buyers toward comparable GT rotors. The 72-vane black electro coat finish is the same across the SRP line.
Compared with a one-piece stock rotor, this part's two-piece design is the main reason to buy it. The rotor bolts to a separate hat, which acts as the center hub. Owners on user forums say this layout lets the manufacturer use high-grade materials for a lighter rotor, which reduces unsprung weight and can help acceleration. The trade-off is durability under heavy use. Owners on user forums warn that drilled rotors can crack quickly on the track, and some recommend avoiding drilled rotors for track events. This rotor suits a street-driven car with occasional track days, not a dedicated race car.
The manufacturer lists this part number as the right-hand side. The left-hand counterpart is listed as 160-8397-BK in the manufacturer's configuration list.
No. The manufacturer's assembly instructions for its two-piece rotors have the installer orient the rotor and hat, then attach the rotor to the hat with bolts and washers. Confirm the hat that matches your hub before ordering, since the manufacturer listing did not confirm whether a hat is included.
The manufacturer rates it for moderate-temperature racing through street use. Owners on user forums suggest leaving out the drilled holes for track events, so a slotted or blank rotor may be the better choice for frequent hard laps.
This is a moderate-difficulty job that involves disassembling the hub and aligning the caliper, so it suits an experienced home mechanic. The manufacturer's install sheets call for red Loctite 271 on the bolt threads, but torque specs differ between kits, with one sheet calling for 155 in-lb in a criss-cross pattern and another for 140 in-lb. Use the value on the sheet supplied with your kit. Make sure the hat fits flush against the hub face, or excessive rotor runout may result. Next, view the rotor through the top opening of the caliper and confirm it is centered, adding or removing shims if it is not. Brake fluid must never contact the pad or rotor friction surfaces. The manufacturer also directs the installer to bed in the pads after mounting, and it offers factory dyno-bedded pads and rotors for buyers who lack track time for a bedding session.
