Sorry if this is late in coming, but here is the list of work that we have done on the 135i to turn it into the One Lap
car. It started as a minimal option car with the sport package. Additions include:

Engine/Driveline:
Active Autowerke piggyback ECU
Active Autowerke intercooler
Active Autowerke blow-off valve kit
Streamline panel filter
Riss Racing downpipes (catless)
Burger Tuning O2 sims – to keep the CEL light off with the downpipes
Diffsonline 3.46 limited slip differential

Suspension/Handling:
BimmerWorld/JRZ coilover suspension – with JRZ RS dampers and adjustable camber plates
BimmerWorld Evo stainless brakelines
Performance Friction ZR28 front brake kit
D-Force 18x9 LTW-5 wheels
Michelin PS-2 255/35-18 tires

We pulled about 40# out of the front with the PFC brake system. The D-Force wheels and tires take out about 20 more and the suspension is good for another 10-15. We have been pulling out our rear and passenger seats making the total weight of the car minus driver about 3100#. The power of the car is excellent and we have had no issues with check engine lights or limp mode to date. We have enough power to keep us in the game even in a small engine car (which is extremely impressive considering the V8 and V10 competition), and the handling characteristics make up the difference to put us near the front of the pack on this adventure. The brakes (with PFC 01 race pads) are neough to lock up just enough to send a puff of smoke flying before ABS hits. The suspension is one we use for full race and high-end street – meaning we have the ability to dial it in to a variety of conditions. This is one of the reasons the car was so fast in the rain at TWS – dial back the JRZ dampers and it is compliant.

After One Lap, the car will go back to BimmerWorld for some fine-tuning of some of the systems we have developed. At this point, I am pretty happy with the first crack at this new platform!