KSport ProComp Rear Big Brake Kit
2008–2015 Scion xB (xB2)
BKSC040-442SO
Overview:
The KSport ProComp 14" 4-Piston Rear Big Brake Kit is engineered to deliver superior stopping power and enhanced braking performance for the 2008–2015 Scion xB (xB2). Designed for enthusiasts seeking a reliable upgrade over the factory braking system, this kit integrates advanced brake technology to reduce fade and maintain consistent pad contact during aggressive driving or spirited street use. Whether you are upgrading for improved safety, track days, or daily driving confidence, this big brake kit offers a significant performance boost with a focus on durability and ease of installation.
Key Features:
This rear big brake kit combines cutting-edge materials and design to optimize braking efficiency and reliability. Key features include:
- 4-piston aluminum calipers for increased clamping force and improved pad wear
- D.O.T. compliant stainless steel brake lines that resist expansion under pressure for consistent pedal feel
- Large 355mm (14") ventilated carbon steel discs for superior heat dissipation and reduced brake fade
- Machined aluminum hats and carbon steel brackets engineered for strength and lightweight performance
- High-quality KSport SC5 street brake pads included, with optional RC1 race pads available
- Opposed piston caliper design that enhances rigidity and pad contact compared to OEM brakes
- Two-piece floating disc assembly reduces unsprung and rotational weight for improved handling
- Calipers machined from aircraft-grade billet aluminum, weighing just over 5 lbs each
- Aluminum pistons and high-temperature seals for durability under extreme conditions
- Machined protection grooves for bridge tubes to increase caliper longevity
Construction & Design:
The KSport ProComp brake kit is built with precision and high-quality materials to ensure long-lasting performance. The calipers are crafted from aircraft-quality billet aluminum, providing a lightweight yet robust structure that withstands the rigors of high-performance braking. The floating two-piece disc design reduces both rotating and unsprung mass, which enhances vehicle responsiveness and braking efficiency. Stainless steel brake lines prevent expansion under pressure, delivering a firm and consistent brake pedal feel. The kit’s components are engineered to work harmoniously, offering improved heat management and reduced brake fade during demanding driving conditions.
Installation & Fitment:
This big brake kit is designed for straightforward installation on the rear of the 2008–2015 Scion xB (xB2) with minimal tools required in most cases. It fits vehicles equipped with 18" wheels or larger to accommodate the 14" rotors. Please note that the OEM handbrake function will not operate with this kit installed, so alternative parking brake solutions may be necessary. The kit includes all necessary mounting hardware and brackets for a direct bolt-on upgrade, making it an ideal choice for enthusiasts looking to enhance braking performance without extensive modifications.
What's Included:
- Two 4-piston aluminum calipers (aircraft-grade billet)
- Two 355mm (14") ventilated carbon steel floating rotors
- Stainless steel braided brake lines
- Machined aluminum hats and carbon steel mounting brackets
- KSport SC5 high-performance street brake pads
- All necessary hardware for installation
Ideal For:
This brake kit is ideal for Scion xB owners who demand enhanced braking performance for spirited street driving, occasional track use, or improved safety in daily driving scenarios. It suits enthusiasts looking to reduce brake fade, improve pedal feel, and upgrade the aesthetics of their braking system with a high-quality, durable solution. The kit is also well-suited for those who want a lightweight, performance-oriented brake upgrade without compromising reliability or requiring extensive modifications.
