Procomp 2-Piston Rear Big Brake Kit

The Ksport Procomp Big Brake Kit offers a substantial upgrade to your BMW 3 Series E46's braking performance. The design prioritizes easy installation, requiring minimal tools for most applications. Key components include a CNC-machined, one-piece caliper crafted from aircraft-grade billet aluminum, weighing just over 5 lbs. This caliper features an opposed-piston design for improved pad wear and caliper rigidity compared to OEM systems. It also includes aluminum pistons, high-temperature seals, and stainless-steel brake pad wear plates. The kit utilizes a two-piece disc assembly with an aluminum center to reduce rotating and unsprung weight, and stainless-steel brake lines that resist expansion under pressure for a firmer pedal feel. This specific kit (BKBM030-423SO) is designed for the rear of 1999-2005 BMW 3 Series E46 models. It is crucial to note that this kit is for 2WD vehicles only and specifically excludes 330 and xi models. Ksport offers various rotor options, including slotted and cross-drilled designs. Slotted rotors are recommended for track use to expel heat and debris, while cross-drilled rotors are recommended for daily driven vehicles due to their cooler operation and increased "bite." Pad options include SC5 Street pads for daily driving and RC1 Race Pads for track performance. The kit comes with a standard 12-month manufacturer's warranty covering defects.