BMW Z4 (2003-2005) MS45 ECU Tune - Stage 1 Tuning Method:Remote Flash Software + Handheld Flash Tuner Additional Tunes: Three additional tunes

Additional Tunes: Three additional tunes can be purchased for $500

This is why nearly every aftermarket supercharger kit for naturally aspirated BMW M cars uses Alpha-N

This design features our Severn Tuning crest on the front left chest area with our full horizontal logo across the back

Three tunes: $500

it can make problems worse

BMW Z4 (2003-2005) MS45 ECU Tune - Stage 1 Tuning Method:Remote Flash Software + Handheld Flash Tuner Additional Tunes: Three additional tunesSee our full write up for more details and other tuning options! Stage 1: This is our OEM plus tune, ideal for a naturally aspirated engine with modifications ranging from stock to full bolt on. Expect approximately +15 horsepower on a completely stock car, and more with additional modifications. Full and part throttle tuning is optimized through adjustment of VANOS, ignition timing advance, engine torque request, throttle response, lambda targets,