GR Yaris Brake Upgrade Kit – Technical Specification
This kit combines a retuned OEM brake booster and a high-flow master cylinder, engineered specifically for the GR Yaris.
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Brake Booster: OEM GR Yaris unit, recalibrated by BCB. Pedal effort (kgf) has been adjusted to provide finer brake modulation across different speed ranges, reducing the aggressive initial bite and delivering a more linear response.
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High-Flow Master Cylinder: Direct-fit from a higher-level model on the same platform. Larger piston bore increases hydraulic pressure build-up speed, improving braking precision and control without altering the original mounting points.
Effect on Brake System Behavior
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Shifts control characteristic from pedal travel-based to pressure-based.
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Enhances stability during trail braking, repeated high-speed stops, and long downhill driving.
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Improves consistency of braking response, aligning system output directly with driver input force.
This upgrade refines the brake system to operate with greater precision, matching the intent of the driver at every speed.
