Wilwood Front Red AERO6/SRP Brake Package, BMW 320i/323i/323is/323Ci/325i/325Ci/328i/328is/328Ci/330i/330Ci (1999–2006)

Red AERO6 calipers identify this 14-inch drilled/slotted Wilwood front kit for the matching BMW E46 assembly. Each caliper uses six pistons over a 1.25-inch-wide vented rotor, with BP-10 pads included. The bolt-on hat arrangement preserves the serviceable factory hubs while changing the rotor and caliper package. 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. Its product range serves motorsport, street-performance, and specialized applications, with individual components selected to match the requirements of the complete brake system.

Technical Details

• Manufacturer part number: 140-11974-DR
• Type: AERO6 Big Brake Front Brake Kit
• Calipers: AERO6; 6 pistons per caliper; Red Powder Coat; radial mounting.
• Piston bores: 1.62, 1.12, 1.12 inches; Stainless pistons. Included pad compound: BP-10.
• Rotors: 14.00-inch diameter × 1.25-inch width; SRP Drilled & Slotted; Spec-37 Iron; Black Electro Coat finish.
• Wheel bolt circles: 5 x 4.72 inches.
• Included: paired calipers, pads, rotors, brackets and assembly hardware, rotor hats.
• Hydraulic flex lines are separate. Master cylinder, booster and spindles are not included; retain or select suitable matching components.
• Conditional minimum wheel diameter: 18 inches. Verify the complete clearance drawing for barrel and spoke offset before purchase.

Fitment & Compatibility

Establish the BMW's actual chassis code and inspect the front upright before purchase. The listed model years span different body generations, so the DS826 sedan/coupe/convertible restrictions and xi exclusions remain essential. Verify the ambiguous is-badge and M entries directly before applying them to a vehicle. The required 18-inch wheel envelope depends on spoke offset as well as diameter. Arrange suitable hydraulic lines, center the calipers and inspect the retained hub bearings during assembly.

Check the individual year, model, submodel and equipment conditions in the fitment table below before ordering.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle, axle or spindle details and wheel measurements for fitment help.

California Proposition 65 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.