The RK Autowerks Stage 1 S55 tune yields an additional ~55WHP and ~80WTQ safely for the moderate consumer looking to get more out of his or her M3/m4.
This software is calibrated to the maximum capacity of the OEM hardware. This software should not be used with additional piggybacks of any kind as it is already fully tuned through ECU software directly.
-Removed cat check option for off-road use
-Removed cold start cat heat up cycle
-Linear torque option for reduced bottom end torque for drivetrain longevity
-Removed top speed limited.