AERO6/SL4R Big Brake Kit, Front and Rear

The Wilwood AERO6/SL4R Big Brake Kit provides a comprehensive upgrade for the 2001-2006 BMW M3, delivering significant improvements in stopping power and heat dissipation for both street and track use. The front of the kit features AERO6 calipers, engineered for high-capacity braking with large-diameter, directionally staggered vane 14-inch rotors. The rear incorporates Forged Narrow Superlite 4R calipers paired with 12.88-inch rotors and BP-10 compound pads, maintaining full functionality of the OE parking brake, master cylinder output, and ABS where applicable. This rear setup complements larger front brake upgrades and enhances performance with wheel, tire, and suspension modifications. To ensure optimal performance, the kit also contains two bottles of Wilwood's Hi-Temp 570 Racing Brake Fluid, featuring a minimum dry boiling point of 570°F to handle severe heat conditions, with a low viscosity for easy bleeding and reduced aeration. Please note that installation of this big brake kit may alter wheel offset and require 18-inch or larger wheels and potentially wheel spacers for proper caliper clearance. It is recommended to consult the wheel clearance diagram before purchase to ensure compatibility with your specific wheels.