Tarox Super Sport Front Big Brake Kit for BMW X3 (F25, 2010-2017) | 355mm 2-Piece Discs & 10-Pot/10-Piston Calipers | Front Brake Upgrade BBK / Big Brake Conversion | B34GT-10 | Fast Road & Track | Fits 18 inch+ Wheels

BMW X3 F25 Front Performance Brake Upgrade | Super Sport 355 mm

Transform the way your BMW X3 F25 stops with this premium Italian-made front braking system. Built around the renowned B34GT-10 multi‑piston caliper and lightweight 355 mm two‑piece ventilated rotors, this Super Sport setup delivers serious stopping power for fast road and track-day use while retaining road manners and pedal comfort.

Part number: B34GT-10

• Vehicle fitment: BMW X3 F25 front axle
• Rotor diameter: 355 mm two‑piece, ventilated
• Caliper: CNC‑machined from solid aluminium billet, B34GT-10 multi‑piston
• Minimum wheel size: 18 inch

Why choose this front brake upgrade

• Massive, repeatable stopping power: High clamping force with even pad pressure across the disc for confident deceleration.
• Outstanding heat control: Two‑piece ventilated rotors and compact piston layout improve cooling and reduce fade.
• Sharper pedal feel: Firm, consistent response that inspires confidence on spirited B‑road drives and at track days.
• Optimised hydraulic balance: Piston sizing is tailored to the X3 F25, so there is no need to change the master cylinder or interfere with ABS or stability systems.
• Low maintenance design: Precision pistons with O‑ring sealing help keep out dust and grime without the need for periodic strip‑downs.

Disc and pad options to suit your driving

Choose the friction material and disc style that matches how you use your X3:

• Pad compounds: Strada (fast road), Corsa (fast road and occasional circuit use), Competizione (track focused)
• Disc patterns: F2000 as standard, with Sport Japan, D95 or C83 available on request at no extra cost

Caliper finishes

Supplied as standard in hard‑anodised grey or black for maximum durability. Colour anodised finishes can be requested; take extra care when cleaning and avoid acid‑based wheel products.

Real‑world results

We have fitted this setup to customer X3 F25 builds and the feedback is consistently positive: stronger initial bite, improved modulation and confidence on repeated high‑speed stops. It is a superb big brake conversion for drivers wanting a serious upgrade without compromising everyday usability.

Good to know

• Build time: Handmade to order in northern Italy. Typical lead time up to 14 days.
• Wheel clearance: Requires 18 inch or larger wheels. If unsure, please check clearance before purchase.
• Images: For illustration only.

Professional installation

For fitting and setup, we recommend MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Search terms our customers use

BMW X3 F25 big brake conversion, front brake upgrade X3, 355 mm performance rotors, 10‑pot calipers, premium braking system for BMW X3, fast road brakes, track day brakes, performance pads, two‑piece discs, Italian performance brakes, B34GT-10 caliper, Super Sport front brakes.