Girodisc 390x34mm Front Replacement Rings Skyline GT-R This is a genuine Radium

This is a genuine Radium Engineering replacement diaphragm for use in Radium fuel pressure regulators

Part Number: 20-0519

Air Control Valve (ACV) delete plate for Mazda RX-7 FD 13B-REW engines

~5Deg C drop in temperatures when compared to the OEM intercooler after multiple repeated runs

Girodisc 390x34mm Front Replacement Rings Skyline GT-R This is a genuine RadiumOur 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.