Audi S4 B6 2001 to 2004 S4 4.2 V8 remap
Standard this engine makes 344hp and 410Nm. Our STAGE 2 file takes it to 380hp and 445Nm.
Where the power arrives
Power and torque through the rev range, on the STAGE 2 file.
- Standard 344hp
- Remapped 380hp
- Standard 410Nm
- Remapped 445Nm
Stages for this engine
Stage 1 needs nothing fitted. Anything above assumes the supporting hardware is on the car already.
Remapping the S4 4.2 V8
The Audi S4 B6 2001 to 2004 S4 4.2 V8 runs a factory calibration built to cope with poor fuel, skipped servicing and hot countries. We rewrite the fuelling, boost and timing for this engine on this car, then test it before you get it back. The original file is kept, so it can go back to standard whenever you want.
On the petrol side the difference shows in throttle response and in how hard it pulls through the top half of the rev range. It feels sharper off idle and keeps going where it used to flatten out.
Figures on this page are for a standard car in good health. We read the fault codes and check the basics first, and if something needs attention we will tell you before we write anything. Have a look at the other engines on the B6 2001 to 2004, the full S4 range, or everything we do for Audi.
Similar power, other makes
Cars running about the same standard output, for comparison.
Other S4 generations
Book your S4
We write and test every file at our Aston workshop, on our own rolling road. Ring us with your reg and we will tell you what your car should make before you commit to anything.