The GKTech R33X‑BMCS Brake Master Cylinder Stopper is designed to improve brake pedal feel by reducing firewall and brake booster movement under hard braking for the Nissan Skyline R33 GTS25-t & R34 25GT-t. This simple yet effective upgrade helps deliver a firmer, more consistent brake response, particularly in performance and spirited driving conditions.

During aggressive braking, firewall flex can introduce a spongy or inconsistent pedal feel. The GKTech R33X‑BMCS braces the brake master cylinder against chassis movement, helping maintain consistent hydraulic pressure and improved brake modulation when it matters most.

Engineered specifically for the R33 and R34 Skyline chassis, this stopper is designed for straightforward installation and long-term durability. Its rigid construction provides effective reinforcement without interfering with normal brake system operation.

Key Features

• Reduces brake booster and firewall flex under load
• Improves brake pedal firmness and consistency
• Direct bolt-on design using existing mounting points
• Designed for performance street and enthusiast vehicles

Vehicle Application & Fitment

• Nissan Skyline R33 GTS25‑T
• Nissan Skyline R34 GT‑T
• Nissan WGNC34 Stagea (turbo models only)

Why Choose GKTech

GKTech is known for producing practical, performance-driven components designed specifically for popular enthusiast platforms. The R33X‑BMCS reflects their focus on functional upgrades that deliver measurable improvements in driving confidence and control.