Hardrace Brake Master Cylinder Stopper RHD 2012-2017 Impreza / 2013-2017 Crosstrek / 2014-2021 WRX/STI | Firewall Reinforcement | Brake Pedal Enhancement

Overview

The Hardrace Brake Master Cylinder Stopper is a precision-engineered solution designed specifically for select Subaru models including the 2012-2017 Impreza, 2013-2017 Crosstrek, and 2014-2021 WRX/STI. This component addresses a common issue in Subaru braking systems where the firewall flexes under heavy braking, causing a spongy or inconsistent brake pedal feel. By reinforcing the firewall area behind the brake master cylinder, this stopper reduces flex and displacement, resulting in a firmer, more responsive brake pedal that enhances driver confidence and control.

Crafted with high-strength materials and finished with a durable ED-coated black or blue anodized surface, the Hardrace stopper exemplifies thoughtful engineering focused on durability and performance. Its design is tailored to fit right-hand drive (RHD) vehicles, ensuring precise fitment and optimal function without modification. Hardrace’s commitment to quality and platform-specific solutions makes this stopper a reliable upgrade for Subaru enthusiasts seeking to improve brake feel without extensive modifications.

For Subaru owners, especially those who push their WRX/STI or Impreza models on spirited drives or track days, the reduction in firewall flex translates directly to improved brake modulation and pedal feedback. This upgrade complements other braking enhancements by providing a solid foundation for consistent brake performance, making it an essential part of any brake system upgrade or maintenance plan.

Features & Specifications

This Hardrace Brake Master Cylinder Stopper is engineered for Subaru Impreza, Crosstrek, WRX, and WRX STI platforms and features a high-strength construction with an ED-coated finish. Constructed from durable steel, it delivers improved brake pedal feel and reduced firewall flex for Subaru enthusiasts seeking enhanced braking response and reliability.

Brand: Hardrace
Product: Brake Master Cylinder Stopper RHD
Part Number: HR-Q0727
Fitment: 2008-2016 Impreza, 2011-2014 STI, 2011-2014 WRX, 2013-2016 Crosstrek, 2015-2021 STI, 2015-2021 WRX, 2017-2023 Crosstrek, 2017-2023 Impreza
Material: Steel
Finish: Blue anodized / ED coated black
Construction: Welded, high-strength fabrication
Origin: Not specified
Drive Side: Right-hand drive (RHD) only

Key Benefits

Brake Performance: Reduces firewall flex to deliver a firmer, more consistent brake pedal feel under heavy braking.
Durability: High-strength steel construction ensures long-lasting reinforcement without deformation.
Fitment: Designed specifically for RHD Subaru Impreza, Crosstrek, WRX, and STI models for precise, bolt-on installation.
Pedal Response: Improves brake modulation and driver confidence by minimizing master cylinder displacement.
Finish Quality: Available in durable blue anodized or ED coated black finishes to resist corrosion and maintain appearance.
Subaru Specific: Tailored engineering that addresses a known Subaru chassis flex issue for enhanced braking feel.

What's Included

1× Hardrace Brake Master Cylinder Stopper RHD

Installation & Compatibility

Installation of the Hardrace Brake Master Cylinder Stopper is straightforward for those with basic mechanical skills and access to common hand tools. It bolts directly to the firewall behind the brake master cylinder, requiring no welding or permanent modifications. However, professional installation is recommended if you are unfamiliar with brake system components to ensure proper fitment and safety. This stopper is designed exclusively for right-hand drive Subaru models listed in the fitment and is not compatible with left-hand drive vehicles. No tuning or brake system recalibration is necessary after installation.

Professional Installation: Recommended for safety and proper fitment
Modifications Required: None
Verify Compatibility: Confirm fitment for your specific year, model, and RHD configuration

Shop with confidence at Subimods—your Subaru parts specialists.

2008-2016 Impreza Brakes

Hardrace Brake Master Cylinder Stopper RHD 2012-2017 Impreza / 2013-2017 Crosstrek / 2014-2021 WRX/STI