The Wilwood 160-8397-BK is a left-hand, 14.00 x 1.25-inch SRP Drilled and Slotted rotor on a 12 x 8.75 bolt pattern, built from Spec-37 iron with 72 curved vanes and finished in black electro coat. Its directional cross-drill and face-slot layout is what sets it apart from a plain stock rotor. The venting and cleaning action of the holes and slots reduces pad glaze and disperses gases and heat at the pad-to-rotor interface. The openings also discourage uneven pad compound buildup on the faces, which the manufacturer ties to smoother engagement and steadier pedal feel. The manufacturer positions it for moderate-temperature racing through street use and points to its GT-series rotors for the most demanding track durability. For a street rod or domestic performance build that needs a left-side 12 x 8.75 drilled rotor, this is a direct upgrade path.
On the fitment side, the manufacturer lists street rod, street performance, and domestic heavy-duty applications, so confirm hat, caliper, and wheel clearance before ordering. At 1.25 inches thick, clearance is a real concern: the manufacturer's install sheets require a minimum of .080 inch between the wheel and caliper in all areas. Bedding-in is the other step to plan for. Track time for a proper pad and rotor bedding session can be hard to schedule, so Wilwood offers factory dyno-bedded pads and rotors. Searchers looking for a left-hand 14-inch SRP drilled rotor, 12x8.75 bolt pattern, or Spec-37 iron brake rotor for a street performance build will find this part's specs here.
The manufacturer lists this part as left-hand (L/H). The right-hand counterpart is part number 160-8396-BK.
The manufacturer's assembly sheets for its SRP rotors show the rotor bolted to a separate hat or adapter using red thread locker, so confirm hat requirements for your application before ordering.
The manufacturer lists the rotor as not burnished. It also offers factory dyno-bedded pads and rotors for buyers who cannot get track time for a proper bedding session.
The manufacturer's assembly instructions for its SRP rotors describe bolting the rotor to the hat with red thread locker and tightening in a criss-cross sequence, with safety wire as an optional extra for added security. The hat must sit fully flush against the axle hub flange, or excessive rotor runout may result. Check the rotor against the existing dust shield for clearance, and mount the calipers with shims so the rotor is centered in the caliper opening. Wilwood's install sheets state that installation should only be performed by persons experienced with disc brake systems, so a novice should consider professional help. Use the torque value from the install sheet for your specific kit.
