Wilwood Black SX6R Front Disc Assembly with Drilled 15-Inch Spec-37 Rotors, Listed Corvette/XLR and Ridetech Hub-Spindle Applications

Black SX6R calipers use BP-10 pads against drilled-and-slotted 15-inch rotor rings in this dynamic front assembly. Aluminum lug-drive hats and mounting hardware are supplied, with no wheel hubs or hydraulic flexlines included. Founded in 1977 by Bill Wood, Wilwood Engineering is now based in Camarillo, California, where its work centers on disc brake systems and components. Calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized installations; selecting these parts requires considering the complete braking system.

Technical Details

• Manufacturer part number — 140-15311-D.
• Hydraulic package contents — brake lines included: No; master cylinder included: No; booster included: No.
• Mechanical package contents — no separate hubs included; mounting hardware included: Yes; spindles included: No.
• Rotor mounting hat — aluminum; Type III Anodize; hat offset 0.290 in; dynamic lug drive.
• Nominal minimum wheel diameter — 19 in; 482.6 mm; verify full spoke and barrel clearance using the kit drawing.
• Hat wheel-stud clearance diameter — 0.520 in; 13.21 mm.
• Wheel bolt circle — 5 X 4.5 in; 5 X 114.3 mm; 5 X 4.75 in; 5 X 120.65 mm.
• Supplied pad compound — BP-10.
• Caliper color, finish and hydraulic inlet — Black; Black Powder Coat; inlet 1/8-27 NPT.
• Service caliper assembly — SX6R; 6 pistons in each caliper; Stainless pistons; Forged Aluminium body; Radial mounting.
• Rotor construction and friction surface — Spec-37 Iron; Vented; SRP Drilled & Slotted; surface finish: Black Electro Coat.
• Rotor dimensions — outside diameter 15.00 in; 381 mm; thickness 1.25 in; 31.75 mm.
• Brake function and supply — Front Brake Kits - Street Performance; Disc braking; front axle; Sold as a kit.
• Flexline specification — Line kit included (manufacturer): None; Front line-kit reference: 220-8176, 220-9100.

Fitment & Compatibility

Match the exact factory C5/C6 Corvette or XLR application, or the required Ridetech HUB-spindle conversion on earlier GM chassis. Pin spindles are a different interface. DS1284 details the assembly; check the 19-inch wheel envelope and verify chassis-end fittings and hose length separately.

The application list names Chevy II, Corvette, Skylark, Special, Sportwagon, Chevelle, El Camino, 442, Cutlass, F85, Vista Cruiser, Beaumont, GTO, LeMans, Tempest, Gran Sport, Camaro, Cutlass Supreme, Firebird, GS 350, GS 400, Nova, GS, GS 455, Sprint, Ventura, Apollo, Omega, XLR. Verify the particular year and suspension/brake option for each model. Use the fitment table below to confirm year, model, trim and brake or suspension options.

Choose any alternative flexline for the actual route and chassis fittings, with enough travel and the correct flare connections.

PMB Performance brings over 20 years of parts and fitment experience. Send the vehicle details and installed brake/suspension configuration if you need help checking this package.

Check the Installation instructions for the full assembly and wheel-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.