Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Red FNSL4R calipers clamp the 12.88 x 1.10-inch drilled and slotted rotors in this rear disc/parking conversion. Designed for the specified Ford 8.8 five-lug axle, the package keeps hydraulic braking separate from the internal mechanical parking shoes. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among the disc brake systems and components Wilwood Engineering designs and manufactures. The Camarillo, California company was founded by Bill Wood in 1977 and supports motorsport, street-performance and specialized applications. Select the individual parts around the requirements of the entire braking system.
Technical Details
Kit contents and separate parts
- Manufacturer part number: 140-9223-DR
- Supply: one kit with brake components for both sides of the rear axle
- Mounting hardware: included
- Hubs: not included
- Spindles, master cylinder and brake booster: not included
- Hydraulic hoses: not included
- Required axle housing end: 8.8 Ford
- Axle offset: 2.50 in; 63.5 mm
- Disc/drum internal parking assemblies, mounting brackets and rotor hats are supplied.
Rotors and mounting dimensions
- Rotors: 12.88 in; 327.15 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
- Friction faces: SRP Drilled & Slotted
- Rotor finish: Black Electro Coat
- Internal vanes: 48 curved
- Hats: aluminum; Black E-Coat; 1.540-inch hat offset
- Rotor/hat wheel-stud clearance patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm
- Hat wheel-stud clearance holes: 0.520 / 0.520 / 0.520 in, corresponding to the listed hat patterns
Calipers and friction components
- Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper
- Caliper finish: Red Powder Coat
- Body construction: Forged aluminum
- Piston material: stainless
- Caliper mounting: radial
- Hydraulic inlet: 1/8-27 NPT
- Included pad compound: BP-10
- Listed piston bore sizes: 1.12 / 1.12 in
Fitment & Compatibility
For five-lug Ford 8.8 rear axles with the 2.50-inch offset and housing flange shown in DS-533. Measure the installed axle rather than selecting from the rear-end name alone; aftermarket housings may carry different ends. Confirm the bearing, 2.80-inch center register, stud clearance and available space around the shocks. The multi-pattern hats accommodate compatible existing axle studs; they do not change the axle wheel pattern. Supply suitable hydraulic hoses and parking cables separately; Wilwood lists universal cable kit 330-9371. Nominal minimum wheel diameter: 17 in; 431.8 mm. Compare the actual wheel barrel and spokes with the linked clearance drawing; diameter alone does not establish fit.
Installation documents
WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.
For help matching the axle, spindle and brake components, contact PMB Performance. Our team brings over 20 years of experience in brakes and vehicle restoration.
