Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The yellow Powerlite is the four-piston, 1.38-inch-bore version in the wider rotor configuration. It has a forged aluminum housing with a 5.08-inch radial mounting pattern and a 1/8-27 NPT inlet. The color distinguishes the finish while the 0.79–0.86-inch thickness limits establish the required rotor package. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and components, from calipers and brake rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications; selection depends on the complete brake system.
Technical Details
- Manufacturer part number: 120-8729-Y
- Caliper type: Powerlite Radial Mount
- Construction: Forged Aluminium
- Finish: Yellow Powder Coat
- Piston bores: 1.38 / 1.38 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 3.00 square inches
- Dust boots: No
- Nominal rotor width: 0.86 inch
- Rotor thickness limits: 0.79–0.86 inches
- Rotor diameter limits: 9.45–11.00 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.08 inches
- Mounting-hole size: 0.40 inch
- Mount height: 1.56 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7912
- Published pad area: 5 square inches
- Published pad volume: 1.8 cubic inches
- Manufacturer-listed component weight: 2.8 lb
Fitment & Compatibility
Compare the caliper dimensions with the bracket and wheel before selecting the yellow finish option. Confirm rotor centerline, pad overlap and a compatible diameter, then check the fitting and hose route. The larger Powerlite piston area must agree with the hydraulic system and should not be substituted solely to match another visible component.
PMB Performance has over 20 years of experience helping customers with brake and parts fitment. Share the installed component identification and relevant measurements when requesting assistance.
