Auto Racing Driver Safety Gear at CMS – Page 37

Two-piece Girodisc brake rotors with curved slots with black rotor hats and gold-colored hardware.

Girodisc A1-322 Girodisc BMW G8X M3, M4 Front Iron Rotor Conversion $1,450.00

A1-322 Girodisc BMW G8X M3, M4 Front Iron Rotor Conversion Price: $1,450.00 These Girodisc A1-322 2-piece rotors directly replace the 400 mm carbon-ceramic (CCB) front rotors on the BMW G8X M3 & M4. The fully floating design reuses the factory CCB calipers and requires no permanent modifications—just swap rotors and run the factory iron pad shape for the calipers. Vehicle Fitment BMW G80/G81 M3 with CCB – Front BMW G82/G83 M4 with CCB – Front 400 mm Iron, Built to Run Cool High-carbon iron rings with curved internal vanes pull cooling air through the disc for stable performance under repeated hard stops. Reusable 6061-T6 aluminum hats and cadmium-plated hardware control thermal growth and keep noise down in street use. Features Direct CCB-to-iron conversion; no coding or bracket changes 2-piece floating construction reduces unsprung/rotational mass Curved-vane rings for strong airflow and heat rejection Reusable aluminum hats; new hardware included Manufactured and assembled in Bellingham, WA Sold/priced per pair A1-322 FAQs Do I change calipers? No. These rotors are designed to run with the OEM CCB calipers. Which pads do I use? Use the factory iron pad shape for the G8X CCB calipers (not the carbon-ceramic pads). Any coding needed? No — critical dimensions match CCB spec, so ABS/DSC calibration remains correct. Wheel clearance vs. CCB? Rotor envelope matches the 400 mm CCB setup, so wheel clearance is unchanged. Front replacement ring part number? D1-220 400 mm front rings. Related Products D1-220 Girodisc BMW F8X/G8X 400mm Front Replacement Rings A2-322 Girodisc BMW G8X M3, M4 Rear Iron Rotor Conversion D2-322 Girodisc BMW G8X Iron Conversion Rear Replacement Rings

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