034Motorsport 380x30mm 2-Piece (2pc) Floating Front Brake Discs Rotors for BMW M2 M3 M4 F80 F82 F83 F87 F8X – Direct Fit OEM Caliper Replacement Pair, Vented Slotted J-Slot Performance Upgrade, Replaces 34112284809 34112284810

High-performance two piece front brake discs for BMW F8X M2, M3, M4

Unlock sharper stopping power and cooler, more consistent braking with these premium floating front discs engineered for the BMW F8X platform. Designed as a direct-fit replacement for the factory front setup, this 380 x 30 system works seamlessly with the original callipers on the M2, M3 and M4. Expect improved bite, impressive heat management and reduced rotational mass for faster response and confident pedal feel on fast road drives.

• Direct replacement 380 x 30 front discs for BMW F80 F82 F83 F87 M2, M3, M4
• Approx. 23.8 lb each, trimming unsprung and rotational weight versus stock
• Two piece floating construction for superior thermal stability and reduced judder
• Aerospace-grade 6061-T6 aluminium hats for strength and weight savings
• CM-250 special alloy rings built to handle intense braking temperatures
• J-slot friction faces help clean pads, vent gases and minimise noise
• 72 directionally curved internal vanes to force cooling air through the disc
• High-strength steel bobbins allow true axial and radial float for safe expansion
• Replaceable rings for lower long-term running costs
• OEM fitment with factory callipers, no custom brackets required

Every detail is optimised for performance. The lightweight aluminium hat reduces unsprung mass, while the special alloy rings retain the right thermal mass to capture and shed heat effectively. The 72 curved vanes actively pull air through the disc to combat fade, and the J-slot pattern refreshes the pad face to maintain consistent friction. The floating bobbin system isolates heat, allowing the ring to expand and contract without stressing the hat, helping keep pedal feel consistent and vibration low.

We fit these on customer cars and our own builds, and the feedback is exactly what enthusiasts want to hear: stronger initial bite, better confidence on repeated hard stops and excellent stability under heat. A brilliant upgrade for spirited road use and heavy braking scenarios where standard discs struggle.

What you receive

• 380 x 30 left front disc
• 380 x 30 right front disc
• Installation and bed-in instructions

Compatibility and cross-reference

Direct replacement for BMW OE references:

• 34 11 2 284 809 (Left)
• 34 11 2 284 810 (Right)

Professional fitting available

Want it installed by specialists who know the F8X platform inside out? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Keywords: BMW F80 F82 F83 F87 M2 M3 M4 front brake discs, floating discs, two piece rotors, 380x30 front brake kit, performance braking upgrade, curved vane vented discs, J-slot slotted discs, lightweight aluminium hat, direct fit OEM calliper compatible, fast road braking, heat dissipation, fade resistance, replaceable rings, axial float, radial float, UK performance parts.