Tarox 350mm Rear Big Brake Kit for BMW 4 Series | Super Sport big brake conversion | 2-piece vented discs & multi-piston calipers | Fast road/track | Fits F32 F33 F36 G22 G23 G26 | Excludes M4 | 18in+ wheels | B34GT-6

Unlock serious stopping power for your BMW 4 Series with this Italian-built rear axle performance braking upgrade. Hand crafted for enthusiasts who demand stronger deceleration, cooler running rotors and rock-solid pedal feel, this package delivers the confidence you want on fast-road drives and track days alike. Fits BMW 4 Series models and is not suitable for M4 variants.

Caliper code: B34GT-6

Why drivers choose this upgrade

• Billet aluminium multi-piston calipers for even pad pressure and superb modulation
• Two-piece vented 350 mm rear rotors for reduced unsprung mass and improved heat management
• Precisely engineered to work with the factory master cylinder and retain ABS and stability systems
• Hand built in Northern Italy from premium materials for durability and performance
• 18 inch minimum wheel clearance

Tailor your setup

• Pad compounds at no extra cost:
  • Strada – fast-road
  • Corsa – road and occasional circuit use
  • Competizione – circuit-only
• Rotor styles available on request at no extra cost: F2000, Sport Japan, D95, C83
• Caliper finishes: hard anodised grey or black for maximum longevity, with colour options available on request

What makes it outstanding

• Even pad wear thanks to optimised piston layout
• Consistent brake feel under repeated heavy use
• Reduced heat soak and improved cooling airflow behind the pad backing plate
• No periodic servicing required under normal use

Built for your BMW

Created to suit the BMW 4 Series range excluding M4, this rear big-brake conversion is a direct, bolt-on solution that works harmoniously with your OEM hydraulics and electronics. No coding or additional hardware changes are required.

Lead time

Each set is assembled to order. Please allow up to 14 days for dispatch.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or advice, email info@mjmodifications.co.uk.

Real-world results

We have installed these kits for customers who demand reliable, fade-resistant braking. Feedback consistently highlights stronger bite, improved pedal consistency and confidence-inspiring performance on spirited drives.

Images for reference only.

Key specifications

• Caliper: B34GT-6
• Rotor: two-piece vented, 350 mm diameter
• Minimum wheel size: 18 inch

Search-friendly terms customers use

BMW 4 Series rear brake upgrade, big brake conversion, performance braking system, rear rotor and caliper kit, high performance rear brakes, track day brake upgrade, Italian performance brakes, uprated rear brakes for BMW 4 Series, rear axle braking package, fast road brake kit.