Wilwood Rear GT Rotor Brake Package, Red AERO4/MC4 Calipers, C7 Front Uprights Used on Rear Chassis

This Wilwood AERO4/MC4 rear brake kit pairs red 4-piston calipers with 14.00-inch gt slotted brake rotors for C7 Front Uprights on Custom Rear Chassis. The package must match the documented mounting arrangement and wheel clearance before the original brakes are removed. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. Its disc-brake systems and components serve motorsport, street-performance and specialized applications. The range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to suit the requirements of the complete system.

Technical Details

• Manufacturer part number: 140-17142-R; supplied as an axle kit.
• Rotor hats: Aluminum big brake hat - flared bell; Black E-Coat; hat offset 0.540 inches. Hat offset is distinct from axle offset.
• Hydraulic sizing: cataloged bore sizes 1.12, 1.12 inches; piston area 1.98 square inches; inlet 1/8-27 NPT.
• Service calipers: AERO4; 4 pistons per caliper; Red Powder Coat; radial mounting; stainless pistons.
• Supplied friction pads: BP-10 compound; match operating conditions to the intended use.
• Brake rotor size: 14.00-inch outside diameter × 1.10-inch thickness; vented friction section.
• Rotor/hat mounting-hole pattern: 5 X 4.5 in; 5 X 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; cataloged hole clearances 0.580 in; 14.73 mm; 0.520 in; 13.21 mm. These are rotor or hat drillings, not replacement wheel studs. The retained hub or axle determines the vehicle wheel pattern.
• Parking brake: Separate MC4 mechanical parking calipers supplied; arrange suitable cable operation.
• Rotor specification: Material: Spec-37 Iron; Type: GT 72 Curved Vane; Style: GT Slotted; Surface Finish: Black Electro Coat.
• Wheel envelope: 18-inch minimum nominal wheel diameter; verify the entire wheel-clearance drawing, including spoke and barrel shape.
• Hardware and retained components: Mounting hardware supplied; existing wheel hubs retained; spindles, master cylinder and brake booster are not included.
• Hydraulic lines: Hydraulic flexlines and fittings are not included; select compatible lines for the complete installation.

Fitment & Compatibility

DS1528 documents a C7 Corvette front upright used at the rear of a custom chassis. Verify the Roadster Shop Fast Track IRS arrangement and exact upright, hub register, stud pattern and 18-inch wheel clearance; this is not a stock C7 rear-brake replacement. The MC4 is a separate mechanically actuated parking caliper. Plan compatible cable actuation and separate hydraulic hoses.

A VIN helps identify the original specification; measured hardware matters after a conversion. PMB Performance draws on more than 20 years of experience when reviewing those details.

Review Installation instructions for the complete installation and clearance requirements.

Manufacturer Warning

Applicable to 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.