Wilwood Front AERO6 Brake Kit for BMW 323i/323is/328i/328is/323Ci/328Ci/320i/325Ci/325i/330Ci/330i (1999–2006), Black Calipers, 14-Inch GT Rotors

Black AERO6 six-piston calipers and 14-inch GT slotted rotors form this Wilwood front BMW brake package. The separate-hat layout retains suitable original hubs, with 1.25-inch-wide Spec-37 iron rings and supplied BP-20 pads. It is configured for the stated E46 front assembly; a BMW model badge alone does not establish chassis or drivetrain compatibility. 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
• Type: AERO6 Big Brake Front Brake Kit
• Calipers: AERO6; 6 pistons per caliper; Black Powder Coat; radial mounting.
• Piston bores: 1.62, 1.12, 1.12 inches; Stainless pistons. Included pad compound: BP-20.
• Rotors: 14.00-inch diameter × 1.25-inch width; GT 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

DS826 specifies E46 sedan, coupe and convertible production splits and excludes xi where stated. Identify the actual chassis and front upright before ordering, especially with 1999 coupe/convertible badges and the M-labeled application entries. Confirm those questionable rows with Wilwood rather than treating them as E36 or M3 approval. A conditional 18-inch minimum requires the entire wheel profile. Choose brake hoses separately and check the retained hubs, hat registers and caliper alignment.

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.