The best performance software available for your S54 engine.
M3 from 2001-2005, MZ3 from 2001-2002, and M coupe from 2001-2002.
ECU must be shipped to us for programming.
For CSL/CSL replica airboxes, open trumpets, or any other MAF-less tuning.
Please include other modifications (pullies, exhaust, etc) as well as pictures of the engine bay and intake layout when possible. Email us with any questions.