*We offer a $100 refund if you send in your stock WORKING ECU.

ECU came out of my 2001 B5 S4. I sold the car and returned most of it back to stock; thus, I no longer have use for this. 

This should be interchangeable with 2001, 2001.5 or 2002 Audi B5 S4 6-Speed Manual with Hitachi MAF. Please confirm compatibility before purchasing.

It has a stage 3 tune on it with the following specs:

-boost peaks at roughly 22-23 psi

-EGT sensors deleted

-o2 (oxygen) sensors deleted (for catless downpipes...piggies)

The tune is made for an 85mm MAF housing and 72lb (750cc) injectors. (I used Bosch EV14 72lb 750cc)

I also have a stock M-box for sale in my other listing.

Please contact me with any questions.