Beedub said:this is how its done in todays world...
http://www.esstuning.com/products/ESS-E%252dFlash-E85-Z4M-ECU-Tuning-Software-.html
you get software for your laptop, plus a usb to obd cable, you save your stock tune to the programme and you load the ESS tune to the car.... Job done. They can add all sorts of stuff during this point, sport button memory, shift lights, raised rev limiter... hell you can even ask them for a valet map so the car wont rev past 2k revs if you ever leave it places where someone where your worried about joy riders.
Beedub said:chipping..... havent hard of that term since my fiesta Rs turbo days......
original guvnor said:Markos, I'm not wanting to doubt your friends claims, but I would be astonished if an E46 M3 could equal/outrun an E92 M3 solely on the completion of a remap. Even if it made an additional 15bhp that would be nowhere near enough. The CSL i think makes only about another 17bhp IIRC, and to make that it needed new cams, airbox, Alpha N tune and a reasonable weight reduction, yet performance-wise it is still someway off an E92 M3.