The Wilwood 160-2898 is a right-hand plain-face rotor from the Ultralite 32 (UL-32) line, a 32 CV iron casting that measures 11.75 inches in diameter and 1.25 inches wide. The manufacturer says the rotor is cast from premium grade, long grain carbon iron for long wear, high thermal stability, and resistance to distortion. Its suitable for moderate temperature racing to street use rating makes it a practical step up from stock for sportsman racing and performance street cars. Buyers weighing it against cheaper rotors should know that owners on user forums describe Wilwood as strong value for the money, while others have reported cracking after heavy track use, so check rotors regularly. Replacing both sides? The left-hand partner is 160-2899.
Wilwood lists this rotor by its dimensions rather than by vehicle, with an 8 x 7.00 in. bolt pattern and a 0.326 inch mounting hole, so confirm hub, hat, and caliper compatibility before ordering. The rotor mounts to a separate hat, and Wilwood's kit sheets call for red threadlock on the rotor-to-hat bolts. Owners on user forums report bolts backing out after a season of track days, so re-torque them after the first sessions. Searches for "Wilwood UL-32 curved vane 11.75 rotor," "8x7 directional vane rotor," and "right hand sportsman racing brake rotor" lead to this exact part.
The manufacturer lists the 160-2898 as right-hand (R/H). The left-hand version is the 160-2899, which uses the same plain-face UL-32 design.
The manufacturer describes the UL-32 casting as suitable for moderate temperature racing through street use. It is not designed for extreme high-heat race conditions.
Per the manufacturer's kit assembly sheets, safety wire is an optional added measure of security for the rotor-to-hat bolts. Owners on user forums commonly use threadlock and re-torque as the primary defense against loosening.
Wilwood's assembly sheets say this type of work should only be performed by someone experienced with disc brake systems, so treat it as an intermediate job. Orient the rotor and hat as shown in the kit diagram, then attach the rotor with its bolts, applying red Loctite 271 and tightening in a criss-cross pattern. Slide the hat and rotor onto the hub so the hat sits flush against the hub face, since an improper seat can cause excessive runout. Hold the assembly with three finger-tight lug nuts while you check dust shield clearance, which may require bending the shield slightly away from the rotor. Confirm that at least 0.080 inch of clearance remains between the wheel and caliper in all areas. Torque specs vary by Wilwood kit, so confirm the value in your specific instruction sheet before tightening.
