Wilwood GT-Slotted Front AERO6 Kit, Red Calipers, for BMW 335i/328i/330i/325i/323i/135i/128i with Listed 2006–2013 Brake Configurations

The GT rotor option pairs red AERO6 calipers with slotted 14-inch Spec-37 iron rings and the BMW-specific mounting hats. Its six-piston hydraulic arrangement is matched to the documented factory system, while the conversion uses the retained front hubs rather than new hub assemblies. The manufacturer, Wilwood Engineering, was founded in 1977 by Bill Wood and is based in Camarillo, California. Its design and manufacturing work covers disc brake systems and components, including calipers, rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized installations each require the individual parts to suit the complete brake system.

Technical Details

• Rotor: 14.00 in; 355.6 mm outside diameter; 1.25 in; 31.75 mm thickness. Material: Spec-37 Iron. Construction: Vented. Friction-face style: GT Slotted.
• Rotor-hat material: Aluminum. Hat offset: 1.550 inches; this hat dimension is separate from axle offset.
• Rotor surface finish: Black Electro Coat.

• Wheel interface: 5 x 4.72 in; 5 x 119.89 mm. Rotor/hat wheel-stud clearance: 0.520 in; 13.21 mm.
• Nominal minimum wheel diameter: 18 in; 457.2 mm. Verify the full wheel-clearance drawing; diameter alone does not establish barrel or spoke clearance.

• Calipers: 6 stainless pistons per caliper; radial mounting; forged aluminium bodies. Color: Red. Finish: Red Powder Coat. Inlet thread: 1/8-27 NPT.
• Caliper family: AERO6. Brake-pad compound: BP-20.

• Manufacturer: Wilwood; manufacturer part number: 140-13582-R. Supplied quantity: Sold as a kit.
• Application category: Front Brake Kits - Street Performance. Axle/spindle category: Front Kits. Brake function: Disc.
• Separate wheel hubs included: No. Retain only the hub arrangement specified for this kit.
• Mounting hardware included: Yes. Spindles included: No. Master cylinder included: No. Brake booster included: No.
• Flexible brake lines included: Yes; matched line kit 220-13646, 22.00 inches nominal length.

Fitment & Compatibility

Review the complete year, body and drivetrain conditions below, including the Canadian sedan and later RWD coupe/convertible rows. Check caliper-to-spoke clearance, dynamic-hat assembly and the included line connections using DS1037 before installation.

Use the fitment table below for the complete model, year, submodel and brake-option conditions; every listed condition must match the installed vehicle.

Manufacturer Documents

• Wilwood product specifications and wheel-clearance drawing
• Installation instructions

Before ordering, PMB Performance can help assess the application using your vehicle and brake-system details. Over 20 years of parts and fitment experience informs that review.