Girodisc Audi 370x34mm Front Replacement Rings VA ✓ Direct-mount RA-series fuel pressure

✓ Direct-mount RA-series fuel pressure regulator

and reduced secondary exhaust back-pressure from the turbine

the stock O2 sensor will need modification

12AN — suits 3/4" hose

Retains OE spring to greatly reduce cam follower wear

Girodisc Audi 370x34mm Front Replacement Rings VA ✓ Direct-mount RA-series fuel pressureOur 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.