This site is specifically concerned with tuning options for the Audi urS cars. These are the 1992 through 1997 Audi S4 and S6 models. MRC has products for other Volkswagen-Audi Group (VAG) vehicles. Information for these products may be obtained here or here.

Basic principles of tuning the AAN engine.
Stage 1 Chipset (AAN)
Stage 2 Chipset (AAN)
Stage 3 Chipset (RS2) (AAN)
Higher Level Chipsets (AAN)
3B Chips
Options
Installation Service
Links and Contacts
Order
Customer Comments
Disclaimer & Copyright

S6 For Sale (Mine)