Girodisc Audi 356mm Rear Replacement Rings 20-0259 65" internal bore capable of

65" internal bore capable of supporting all necessary engine power requirements on the BMW E46 M3 S54

Its simple to see that 50% of the new upgraded intercooler would be seeing no ambient air flow

Rotor to hat mounting system: D-Bobbin (12 bolt)

Sealing: PTFE thread sealant required

Girodisc Audi 356mm Rear Replacement Rings 20-0259 65" internal bore capable ofOur 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.