330mm 4-Piston Big Brake Kit with Vented Rotors

Each caliper in this kit is precision-machined from a solid billet of aircraft-grade aluminum, ensuring exceptional lightness, unparalleled strength, and resistance to corrosion. The calipers feature a 4-piston opposed-piston design that greatly improves pad grip and minimizes uneven wear. Aluminum caliper pistons further contribute to heat resistance and reduced weight. The rotors are a 2-piece vented design constructed from cast iron, featuring an aluminum center to lower rotational mass, promote quicker braking response, and shorten stopping distances. This 2-piece design also allows for less restricted expansion and contraction, greatly reducing the chance of rotor warpage. All caliper seals are heavy-duty, intended for sustained high-temperature racetrack use, and the kit includes stainless steel brake lines that prevent expansion under extreme conditions for faster pedal response. Key features include a minimum wheel diameter requirement of 432mm (17 inches), drilled rotor style, fixed hat construction, and street-performance brake pads. It is compatible with 2008-2014 Subaru Impreza STI (GRB Chassis) models.