GiroDisc GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Slotted Front Rings
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GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Slotted Front Rings

GiroDisc
GIRD1-186
D1-186
Brake Rotors - Slotted
6 Units In Stock - Ships Next Business Day
$ 880.00
$ 880.00

SKU: D1-186

GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Slotted Front Rings

Girodisc slotted front rings replace stock rotors on 2014-2020 BMW M2 M3 M4 F8x models with blue calipers. These 380mm x 36mm two-piece rotors use high-carbon cast iron rings attached to lightweight 6061-T6 aluminum hats for reduced unsprung weight and improved handling. Slotted surfaces clear gases and debris while curved vanes pull heat away from the braking surface during hard use.

Key Features

  • Slotted Rotor Face: Channels brake dust and gases away for consistent pedal feel and reduced fade in repeated stops
  • Two-Piece Design: 6061-T6 aircraft aluminum hat lowers rotating mass by over 40% versus OEM steel hats for sharper response
  • Curved Internal Vanes: 72 vanes direct cooling air through the rotor increasing heat rejection by 25% over flat vane designs
  • High-Carbon Cast Iron Ring: Resists cracking and warping under track abuse while maintaining thickness over time
  • Stainless Steel Drive Buttons: Secure hat-to-ring connection allows thermal expansion without distortion

Product Notes

  • Pair of front rings only requires Girodisc hats and standard M compound pads for complete setup
  • Follow Girodisc bed-in procedure for optimal performance and pad transfer
  • Special order item expect 3-5 business days processing before shipment

Installation Notes

  • Professional installation recommended.
  • Torque hat hardware to 37 ft-lbs and inspect after 100 miles
  • Compatible with OEM blue calipers M sport brakes and Girodisc hat kit D1-186H

This Part Fits

Year Make Model Submodel
2016-2021 BMW M2 All
2015-2018 BMW M3 Base Competition
2015-2020 BMW M4 Base Competition
2015-2020 BMW M4 Convertible Base Competition

Why Choose Girodisc?

  • Proven in IMSA GT4 and club racing with championship wins
  • CNC-machined in USA from aerospace-grade materials
  • Direct replacement engineering fits without hub-centric modifications

Frequently Asked Questions

  • Q: Will these fit BMW F8x models with black calipers?
    A: No these rings fit only blue caliper M brakes 380mm x 36mm. Black calipers use 370mm or carbon ceramic rotors verify caliper color before purchase
  • Q: What material are the rings and hats made from?
    A: High-carbon cast iron slotted rings paired with 6061-T6 hard anodized aluminum hats connected by floating stainless steel buttons
  • Q: What is the warranty and break-in process?
    A: Lifetime warranty against hat-ring separation or warping with proper use. Perform 10 hard stops from 60-10 mph then 3 medium stops cool between sets

Shipping & Handling

  • Method: Ground shipping via UPS or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Oversized box 20 x 20 x 8 inches
  • Weight: 58 lbs

Request For Information

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