GiroDisc 370mm Rear Replacement Rings - BMW M2/M3/M4 (G8X) 2021+ HFX4-3M50 Compare our adapter to the

Compare our adapter to the competition and you will immediately see why we offer the best solution to finally end that pesky leak

expect a deeper and more aggressive intake noise

@PSI) Single  2271@51

Precise pinhole machining results in an exact compression distance as well as precise lock ring groove spacing

GiroDisc 370mm Rear Replacement Rings - BMW M2/M3/M4 (G8X) 2021+ HFX4-3M50 Compare our adapter to theGirodisc replacement rings are sold in pairs and include replacement hardware. The only parts you will reuse are your existing GiroDisc hats. Please note that unless specifically noted, GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2 piece rotors from the factory.