GR Yaris BCB Brake control upgrade kit

Whether your GR Yaris is still running stock calipers or already upgraded ones,
this Brake Booster + High-Flow Master Cylinder combo
delivers sharper, more predictable control across all driving conditions.

This setup is built specifically for the way the GR Yaris drives:

• The brake booster is an OEM GR Yaris unit, retuned by BCB. By adjusting the brake pedal effort (kgf), we've created a setup that allows delicate brake modulation across every speed range.

• The high-flow master cylinder comes from a higher-level vehicle on the same platform, with identical mounting but a larger piston size—building pressure faster and giving you more efficient control.

What you get is not just upgraded hardware,
but a complete reset of how your brake system responds to your foot.

The stock setup works fine for daily driving.
But when you're trail-braking into corners, hitting repeated high-speed stops, or descending long mountain roads,
you'll want the brakes to follow your rhythm—not fall behind it.

With the BCB-retuned brake booster,
the overly aggressive initial bite is removed,
giving you a more progressive and controllable pedal feel throughout the entire braking range.

With the high-flow master cylinder,
brake response shifts from "travel-based" to "pressure-based" control.
It's no longer about how far you press the pedal,
but how much force you apply—and how precisely you apply it.

It feels like a high-revving NA engine:
every bit of input gives you immediate, predictable output.
The car responds as soon as you do—no lag, no hesitation.

You don't need heavier brakes.
You need brakes that move with your intent.

— BCB GR Yaris Brake Control Upgrade Kit