Wilwood Front Red Dynalite Hub Conversion for GM 11-Inch-Rotor Spindles (1979–1990), 12.19-Inch SRP Rotors

The red SRP version pairs four-piston Dynalite calipers with 12.19-inch drilled and slotted rotors. Its hub package suits the specified later-GM disc spindle only after the required steering-arm and mounting-ear work is completed. Founded in 1977 by Bill Wood and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components for motorsport, street-performance and specialized applications. Its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to work together within a properly matched brake system.

Technical Details

• Manufacturer part number: 140-9053-DR
• Included pad compound: BP-10; pistons: stainless steel
• Caliper body: Forged aluminum; hydraulic inlet: 1/8-27 NPT
• Rotor surface finish: Black Electro Coat; rotors are not supplied burnished
• Supplied hub wheel pattern(s): 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm
• Supplied wheel studs: 1/2-20 in
• Hydraulic hoses: not included; match the separate lines and fittings to the application
• Included hub package: hubs, bearings, seals, adapters and mounting hardware; original spindles are retained
• Not included: master cylinder and brake booster
• Wheel clearance: 15-inch wheels may fit; check the complete manufacturer caliper/rotor template
• Quantity: sold as one axle kit
• Service calipers: 4-piston Forged Dynalite Internal; Red Powder Coat; lug mounting
• Brake rotors: 12.19 x 0.81 inches; Iron; SRP Drilled & Slotted; vented

Fitment & Compatibility

This hub kit is for the specified GM factory disc spindles with original 11-inch rotors. The application list includes 1979–1981 Camaro/Firebird, selected 1979 GM compact models, the listed full-size cars and wagons through 1985–1986, and Caprice through 1990. Match each model-year entry and spindle requirement rather than assuming every GM car in this range is covered.

DS504 requires substantial spindle/steering-arm machining, including drilled and tapped bracket holes and removal of interfering ears. Have a qualified machine shop perform the work. Front hoses, including the listed 220-10509 reference, are separate and require vehicle-specific routing checks.

The wheel contact surface must seat fully on the hub. If it overhangs the hub face, Wilwood requires the separate 6.60-inch-diameter x 0.20-inch steel spacer 300-11961. For stamped-steel wheels that do not overhang, Wilwood recommends the 6.15-inch x 0.09-inch hub shield 300-10716. Inspect contact surfaces and follow the wheel maker’s tightening requirements.

The table below gives the detailed vehicle coverage; match the individual entry and each referenced note.

Manufacturer Resources

• Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list

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.

PMB Performance brings over 20 years of experience with brake components and fitment details. Send us your VIN together with the installed axle, spindle, brake and wheel specifications if you need help confirming this package.

Vehicle Applications

Application Notes

1. Front kits fit 11" rotor spindles only.
2. Requires modifications to original spindle
3. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
4. This front brake kit contains no parking-brake mechanism. Parking-brake cable selection belongs to the separate rear brake installation.
5. Line kit included (manufacturer): None
6. Front line-kit reference: 220-10509
7. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.