[Mr. Nice]

I'm assuming they will just upgrade the turbo, similar to the F30 race car we saw a while back.

"Unveiled during the local launch of the newest road-going 3 Series range, the race cars, finished in traditional BMW Motorsport colours and featuring many of the forthcoming M specification components (including brakes, which proved a contentious point come race day) and switchgear took shape over the course of just three months after the ADF Motorsport team took delivery of two road-going test mules that would usually have been crushed after duty. Stripped to their shells, and with an expertly-crafted roll cage in place, the cars use the same N55 twin-scroll single turbocharged in line six engine as featured in the current 335i range. For race application the turbo has been upgraded.

SPECS:

•2,998 pounds (1360kg)
•408hp / 443 lb-ft torque (600nm)
•MoTeC ECU
•Turbos boost lowered to maximum 0.7 bar and 40mm turbo inlet restrictor
•M Performance front brakes (370mm)
•18" BBS wheels
•Akrapovic exhaust
•GPS data logging system
•6 weeks to complete, at cost of 196,300 Euro"