Wilwood 4-Piston Front Brake Kit

2004–2006 Scion xA / xB

140-8335

Overview:

The Wilwood 4-Piston Front Brake Kit is a high-performance upgrade designed specifically for the 2004 to 2006 Scion xA and xB models. This big brake kit delivers enhanced stopping power and improved brake feel, making it an ideal choice for enthusiasts seeking superior braking performance for street, show, or light competition use. Engineered to work seamlessly with the original equipment front hubs, this kit offers a direct-fit solution that elevates both safety and driving confidence.

Whether you are upgrading your vehicle’s braking system to complement suspension and wheel enhancements or preparing your Scion for spirited driving, the Wilwood 4-Piston Front Brake Kit provides a reliable and stylish solution. Its combination of advanced materials and precision engineering ensures consistent performance under demanding conditions.

Key Features:

This Wilwood brake kit incorporates proven technology and quality components to deliver outstanding braking performance:

• Billet Superlite 4-piston calipers for increased clamping force and improved pedal feel
• 13-inch GT directional vane rotors designed for superior heat dissipation and fade resistance
• Machined aluminum hats that reduce unsprung weight and enhance rotor cooling
• PolyMatrix brake pads engineered for consistent friction and long service life
• Complete hardware kit including stainless steel braided brake lines for improved brake fluid transfer and durability
• Direct bolt-on design compatible with OE front hubs, requiring no modifications
• Precision engineering based on Wilwood’s 25+ years of motorsports brake development
• Attractive styling that complements aftermarket wheels and suspension upgrades

Construction & Design:

The Wilwood 4-Piston Front Brake Kit features calipers machined from lightweight billet aluminum, offering exceptional strength and corrosion resistance. The calipers’ four-piston design ensures even pressure distribution across the brake pads, maximizing contact with the rotor surface for improved stopping power. The rotors utilize a directional vane design to optimize airflow and heat dissipation, reducing the risk of brake fade during aggressive driving.

Aluminum hats are precision-machined to exact tolerances, providing a secure and stable mounting platform for the rotors while minimizing rotational mass. The PolyMatrix brake pads are formulated to deliver consistent friction levels and reduced dust generation, contributing to cleaner wheels and reliable braking performance over time.

Installation & Fitment:

This kit is engineered for a direct bolt-on installation to the front hubs of 2004–2006 Scion xA and xB models, requiring no modifications to the vehicle’s existing suspension or steering components. The included stainless steel braided brake lines connect seamlessly to the factory brake system, enhancing pedal feel and brake fluid durability. Installation is straightforward for experienced technicians and enthusiasts familiar with brake system upgrades.

What's Included:

• Right and left billet Superlite 4-piston calipers
• Two 13-inch GT directional vane rotors with machined aluminum hats
• PolyMatrix brake pads pre-installed in calipers
• Stainless steel braided brake lines
• All necessary mounting hardware and installation instructions

Ideal For:

This Wilwood 4-Piston Front Brake Kit is perfect for Scion xA and xB owners who want to upgrade their braking system for improved safety, performance, and aesthetics. It is especially suited for drivers who participate in autocross, track days, or spirited street driving, as well as those who have upgraded wheels, tires, and suspension components and require a brake system that matches their vehicle’s enhanced capabilities.