The Wilwood Ultralite 32 Curved Vane rotor, part 160-2899, is a plain-face iron rotor listed for the left-hand mount side, at 11.75 inches in diameter and 1.25 inches in width. Wilwood's product summary also lists 32 curved vanes and a weight of 9.60 pounds, and describes it as suitable for moderate-temperature use, from racing through street driving. The UL-series line is built around directional vanes that balance efficient cooling against lower rotating mass, and the castings are made from premium grade, long grain carbon iron for long wear and resistance to distortion.
Why pick this over a generic rotor? Owners on user forums have called Wilwood's curved-vane setups among the best value for the money, though one reported that a different Wilwood curved-vane model needed replacement after about 3,000 track miles, citing cracking and pedal pulsation. That makes bedding and inspection part of the ownership plan. The manufacturer's dimensions for this rotor include an 8 x 7.00-inch bolt circle, a 0.326-inch mounting hole, a 6.38-inch lug ID and an 8.34-inch far-side ID. Because the manufacturer's page does not list specific vehicles, check those numbers against your hub and hat before ordering. Searchers looking for a left-hand 11.75 x 1.25 curved-vane iron rotor, an 8x7 track rotor, or a lightweight UL32 replacement will find this part's specifications a match.
The manufacturer lists 160-2899 as the L/H mount-side rotor, and its right-hand version is 160-2898 in the same Ultralite 32 curved-vane line.
The manufacturer's product summary lists it as neither balanced nor burnished. The manufacturer notes that it offers factory dyno-bedded pads and rotors as a separate option.
The manufacturer states that its brake kits should be installed only by people experienced with disc brake systems, so this is best suited to a mechanic or an experienced DIYer. Plan on a torque wrench, red thread-locker, and a few shims. Wilwood's install sheets call for tightening the rotor-to-hat bolts in an alternating sequence, applying red Loctite 271 to the threads, but torque values vary by kit, so use the sheet for your specific assembly. A common gotcha is hub seating: the hat must fit flush against the axle hub flange, or excessive rotor runout may result. Also confirm the caliper is centered over the rotor by adding or removing shims between the bracket and caliper, and keep a minimum of .080" clearance between the wheel and caliper in all areas. Bedding-in is recommended, since getting track time for a proper pad and rotor bedding session can be difficult.
