Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The red left-hand AERO4 places four 1.62/1.38-inch stainless pistons in a forged aluminum body. Radial mounting and internal crossover passages provide the mechanical and hydraulic layout for this 1.25-inch nominal rotor-width version. Wilwood Engineering, founded by Bill Wood in 1977, is based in Camarillo, California. The company makes and designs disc brake components and systems for motorsport, street-performance and specialized applications, including calipers, brake rotors, master cylinders, valves, fittings and brake lines.
Technical Details
- Manufacturer part number: 120-13282-RD. Component: Aero4 Radial Mount caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- 4 stainless steel pistons with 1.62/1.38-inch bore groups. The specified effective area is 3.56 sq in.
- 7.09-inch radial mounting pattern, left hand; mounting height 2.09 inches and hole size 0.45 inch.
- Caliper weight: approximately 6.9 lb.
- The rotor channel is specified for 1.25-inch nominal width. Rotor outside diameter: 12.19 to 15.00 inches. Specified rotor-width limits: 1.10–1.28 inch.
- Piston dust boots: not fitted.
- Red powder coat finish on a forged aluminum caliper body.
- Brake pad profile 6617; select friction material for the actual operating conditions.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
Fitment & Compatibility
A compatible bracket must locate the left caliper over a rotor within its 12.19–15.00-inch diameter range. Check both the 6617 pad cavity and the 1.10–1.28-inch rotor-width limit before selecting the mating components.
Ask PMB Performance to check the complete brake arrangement before ordering. Our team brings over 20 years of experience; photographs and measured bracket and rotor dimensions make that check more useful.
