Vagbremtechnic Front Caliper Upgrade Kit with 4 Piston Brembo Calipers - M3 E46

BMW E46 M3 big brake conversion with 4‑pot Brembo calipers

Transform the stopping performance of your E46 M3 with this front brake conversion using Aston Martin sourced 4‑piston Brembo calipers. This is a proven, bolt‑on solution for fast road and track day use that delivers powerful, repeatable braking without ruining day‑to‑day drivability.

Piston sizing is carefully matched, with only a 1.7 percent reduction in total piston area versus factory, so pedal travel remains close to stock and the factory master cylinder feels natural. Expect strong bite, progressive modulation and confidence‑inspiring control lap after lap.

Why enthusiasts choose this setup

• Aston Martin Brembo 4‑pot calipers for serious stopping power
• Factory‑like pedal feel thanks to optimised piston sizing
• Lightweight aluminium mounting hardware with steel thread inserts and a durable black anodised finish
• HEL Performance braided front hoses with stainless fittings and carbon black sheathing
• High tensile M12x1.25 hardware and spring washers included
• Custom caliper colour and logo options available

Upgradeable, not disposable

Start on original‑size discs, then step up later without buying a whole new kit. When you are ready for larger, better cooled rotors, add our upgrade package, part number UP0001. This includes new brackets and 362 x 32 mm two‑piece discs from AP Racing/Vagbremtechnic for serious heat management and durability.

Fitment notes

• OEM 18 inch wheels require spacers:
  • With 325 mm discs: minimum 16 mm per side
  • With 345 mm discs: minimum 12 mm per side, check clearance to wheel weights
• The factory pad wear sensor cannot be integrated with this setup. Leave the sensor plugged into the loom to avoid a dash light and secure the wiring safely out of the way.

What is included

• 2 x Aston Martin Brembo 4‑piston calipers
• 2 x Base carriers for 325 mm discs
• 2 x Interlocking spacers for 345 mm disc option
• 1 x Pair of HEL braided front hoses
• 4 x 80 mm caliper to carrier bolts for 325 mm discs
• 4 x 90 mm caliper to carrier bolts for 345 mm discs
• 4 x Spring washers

To complete the installation you will need

• 2 x 325 mm or 345 mm OE front discs
• 1 x Set of front pads suited to your driving style
• Brake fluid for a full system flush during installation

Professional installation

For fitting, we recommend booking with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Tried, tested and loved

We run this conversion on our own builds and customers consistently praise the improved stopping performance, predictable pedal feel and overall confidence on spirited drives and track days.

Common search terms: BMW E46 M3 brake upgrade, big brake kit, 4 pot Brembo, Aston Martin caliper swap, bolt‑on brake conversion, uprated stoppers, performance braking, track day brakes, stainless braided lines, HEL brake hoses, AP Racing two‑piece discs, 362 x 32 mm rotors, direct fit E46 M3, fast road brake kit.