PowerStop Aero 4/6/W4A/W6A Radial Mount Track Day SPEC Brake Pads

2011–2025 Subaru Impreza / WRX / STI / Other Models with Radial Mount Calipers

Part #: PSA-R42

Overview

The PowerStop PSA-R42 Aero 4/6/W4A/W6A Radial Mount Track Day SPEC Brake Pads are engineered for high-performance driving enthusiasts who demand maximum stopping power during intense track sessions. Designed specifically for experienced track day racers and competitive drivers, these brake pads deliver exceptional fade resistance, consistent performance, and superior thermal stability under demanding conditions. Whether you're pushing your vehicle on the race track or participating in advanced track days, these pads are built to meet the rigorous needs of serious enthusiasts.

Constructed for those who seek the ultimate in braking performance, the PowerStop Track Day SPEC pads are ideal for drivers running race tires or engaging in competitive motorsport events. They provide the confidence and control necessary to handle high speeds and aggressive driving styles, ensuring you can brake later and more confidently during your track sessions. These pads are a perfect upgrade for your vehicle’s braking system, helping you achieve optimal lap times and improved overall braking response.

Key Features

PowerStop's Aero 4/6/W4A/W6A Track Day SPEC Brake Pads incorporate advanced materials and design features to maximize performance on the track. The pads feature a high-friction compound formulated to withstand extreme heat and reduce brake fade, ensuring consistent stopping power even after multiple hard stops. The use of specialized ceramic and metallic composites provides excellent thermal stability, allowing the pads to operate effectively at high temperatures without glazing or degradation.

• Designed for radial mount calipers, ensuring precise fitment and optimal contact with the rotor for maximum braking efficiency.
• Engineered with a high-performance friction material that offers superior bite and modulation, giving you better control during aggressive braking.
• Optimized for use with race tires and high-grip compounds, making them suitable for competitive racing and spirited driving.
• Constructed to resist brake dust and reduce rotor wear, helping maintain your braking system’s longevity and cleanliness.
• Manufactured with quality materials and precision manufacturing processes to ensure durability and consistent performance over multiple track days.

Filter Options

Construction & Design

The PowerStop Aero 4/6/W4A/W6A Brake Pads are built with a robust high-friction compound bonded to a durable backing plate. The pads feature a radial mount design, which provides a more rigid and precise attachment to the caliper, reducing flex and improving pedal feel. The materials are carefully selected to withstand the extreme heat generated during high-performance driving, preventing brake fade and ensuring reliable operation throughout demanding track sessions. The manufacturing process includes meticulous quality control to guarantee consistent friction characteristics and fitment, making installation straightforward and secure.

Performance & Sound

These track day brake pads are specifically formulated to deliver exceptional stopping power with minimal fade, even after repeated high-temperature cycles. Drivers will notice improved initial bite, stronger modulation, and consistent performance lap after lap. While designed primarily for track use, they also provide excellent performance during spirited street driving, offering a noticeable upgrade over stock brake pads. Due to their high-friction nature, some noise and brake dust may be present, which is typical for high-performance racing brake pads.

Installation & Fitment

The PowerStop PSA-R42 pads are a direct bolt-on upgrade for vehicles equipped with radial mount calipers. Installation is straightforward for those familiar with brake system upgrades, requiring no modifications to the calipers or rotors. It is recommended to bed-in the pads properly following installation to maximize their performance and lifespan. No cutting, drilling, or special tuning is required, making these pads a hassle-free upgrade for serious track enthusiasts.

• Compatible with vehicles featuring radial mount calipers, typically found on performance and race-oriented models.
• Requires standard hand tools for installation; no special equipment needed.

What's Included

• Set of high-performance Aero 4/6/W4A/W6A Radial Mount Track Day SPEC Brake Pads
• Installation hardware and instructions (if applicable)

Ideal For

• Experienced track day enthusiasts seeking maximum brake performance
• Competitive racers in series such as Spec Miata or other racing classes requiring high-performance brake pads
• Drivers who push their vehicles to the limit on the race track and need reliable, fade-resistant braking

Emissions Note

This product is designed for racing and track use only and may not be legal for street use in all jurisdictions. Please check local regulations before installation. Not CARB or EPA compliant for street use.