Wilwood Plain Front Brake/Hub Assembly for Listed GM/Isuzu Cars and 2WD Trucks (1978–2003), Red Six-Piston Calipers

Plain 12.19-inch rotors, replacement hubs and red Dynapro 6 calipers make up this Wilwood front assembly for the specified GM/Isuzu vehicle configurations. The calipers use six pistons, and the kit supplies the required mounting components and BP-10 pads. Correct factory spindle identification remains essential across the mixed car and compact-truck application list; the kit does not convert an unsupported drive layout. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

• Manufacturer part number: 140-12837-R
• Type: Forged Dynapro 6 Big Brake Front Brake Kit (Hub).
• Calipers: Dynapro 6; 6-piston; Red Powder Coat.
• Piston bore dimensions: 1.62, 1.38, 1.38 inches; stainless pistons. Caliper mounting: lug.
• Included pad compound: BP-10.
• Rotors: 12.19-inch outside diameter × 0.81-inch width; Plain Face; Iron; Plain surface finish.
• Rotor ventilation: 32 vanes.
• Wheel-mounting change from OE: 0.00 inch per side.
• Replacement hubs: Hub - Vented Rotor Offset; Aluminum; Bare.
• Wheel bolt circles: 5 x 4.50; 5 x 4.75 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, replacement hubs and bearing hardware.
• Hydraulic flex lines are separate; select the correct fittings, length and route for the vehicle.
• Conditional wheel minimum: 15 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.
• Required spindle preparation: substantial steering-arm/spindle modification includes drilling, tapping and removal of interfering ears. Follow the exact installation drawing; Wilwood recommends a qualified machine shop.
• Conditional wheel support: if the wheel contact face overhangs the new hub, the separately sold 6.60-inch-diameter × 0.20-inch-thick steel support spacer specified in the linked installation instructions is required. Check full seating before assembly. For stamped steel wheels without overhang, Wilwood recommends a separate 6.15-inch-diameter × 0.09-inch-thick hub shield.

Fitment & Compatibility

Begin with model, year and the exact two-wheel-drive or rear-wheel-drive restriction in the table. Observe the rear drum/disc distinctions and inspect any replacement spindle against the installation drawing. The package's published zero wheel-mounting offset change does not guarantee spoke clearance. Check the proposed rim with the full template before fitting tires. Select suitable front hoses separately and secure them clear of moving parts, then verify rotor centering, pedal travel and brake proportioning after the completed installation.

Match the individual year, model, submodel and equipment conditions in the fitment table below.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details for help confirming the complete setup.

Manufacturer warning, brake pads only: 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.