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BCB Brake Booster for Lexus IS / Toyota Altezza (XE10) with enhanced performance

Brand-new OEM-spec booster, upsized dual-diaphragm 8″+9″ (vs. stock 7″+8″), BCB-calibrated for ~30% higher assist. True bolt-on, no chassis mods.

Fitment

  • Platform: XE10 — Lexus IS (1st gen) / Toyota Altezza

  • Engine grades: RS/IS 200/300 variants, even V8 swap can install

  • LHD/RHD: Supported, RHD need to change a vacuum pipe

What It Is

  • New OEM-spec core (not used, not reman).

  • Internal BCB calibration for stable, linear assist (~+30% vs typical stock unit).

  • Pre-set pushrod for XE10 pedal box and factory master cylinder.

Why Owners Buy This

  • Fixes the classic "hissing pedal + heavy effort" from internal booster leakage.

  • Earlier decel for the same pedal input; reduced leg force in city traffic.

  • Keeps factory ABS behavior and hydraulic bias.

What's Included

  • 1× BCB-calibrated new OEM-spec 8″+9″ brake booster (direct fit for XE10)

  • 6x M8x1.25 nuts for spare

Install Notes

  • Direct bolt-on; no firewall or hard-line changes

Short FAQ

Is it new? Yes—brand-new OEM-spec core, calibrated in-house by BCB.
Does it change brake balance? No—assist increases, hydraulics remain factory.

$599.00
excluding shipping cost
In stock

Fitment Confirmation Required (XE10 Master Cylinder Variants)

Because the first-gen Lexus IS / Toyota Altezza (XE10) came with multiple master-cylinder variants, we need a quick visual check before we ship. This lets us pre-set your booster so it's truly bolt-on.

What to do (no hydraulics opened):

  1. With the engine off, remove the two nuts that secure the master cylinder to the booster studs.

  2. Gently pull out the master cylinder—do not disconnect any brake lines, and do not press the brake pedal.

  3. Take 2–4 photos and send them to us

  4. Refit the two nuts tight

Why this matters:
XE10 cars use more than 2 master-cylinder pattern. Your photos let us pre-configure the BCB 8″+9″ booster so it matches your exact unit—no guesswork, no shims on install, no rework.

    Safety notes:

  • Work with the engine off and the car secured.

  • Do not open hydraulic lines; a slight movement is enough for photos.

  • If preferred, any workshop can perform this check in a few minutes.