Wilwood Red SX6R Six-Piston Front Brakes, Dynamic SRP 15 x 1.25-Inch Rotors for Specified Corvette, XLR or Ridetech Hub Spindles

Red six-piston calipers, BP-10 pads and 15-inch SRP rings comprise this front SX6R configuration. The dynamic lug-drive hats mount to the existing specified hub, providing a brake package rather than a supplied wheel-hub conversion. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures disc braking systems and components for street-performance, motorsport and specialized use. Its calipers, rotors, master cylinders, valves, fittings and brake lines are chosen around the hydraulic, mounting and balance needs of a complete system.

Technical Details

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

Fitment & Compatibility

Confirm the exact model-year/trim and hub-spindle arrangement in the applications. Earlier GM and early Corvette model names are conditional on Ridetech HUB spindles, not stock or PIN types. Use DS1284, compare the complete nominal 19-inch wheel profile and select suitable separate hydraulic lines.

Listed model families are 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; the individual year and brake/spindle conditions remain decisive. 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.

For a fitment check, give PMB Performance the vehicle details and the actual brake and suspension hardware. Our team has over 20 years of experience working through parts compatibility.

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.