Hartge releases its software ECU piggyback tune for the BMW 6-cylinder turbo N55 engine. It yields impressive power gains of +56 horsepowers and +59 ft-lb torque! The tune can be applied to the F30 335i, F10 535i and F25 X3 xDrive35i.
The Hartge 'Engine Conversion' is a ... CONTINUED
12 years ago
