Want to get a feeler/gauge on the interest for a group tuning session with TRM, a renowned tuner from the US. www.racersmarket.netThey are currently quite popular in the BMW scene in the US, with very good reviews from many of their customers. mostly Turbo cars.They can tune NA, turbo, superchargers, basically any setups you have in mind. some examples i can recall off my head done which we can relate to. US M3 3.0 NA stock - 230 rwhp328i NA - 20X rwhp with i think only exhaust and air filter.they only work on M50/M52 engines, running on Bosch ecu's which are chip based. If you're running the Siemens ecu, only way is to convert to Bosch. The charge is USD 1000 per car approx, pricey, but then again, its custom dyno tuned, and they're renowned for getting good hp/torque while maintaining daily driving feel. dyno costs is not covered, so we have to somehow share that.another plus point is from the specs of your car, they will be able to tell you what injectors, HFM etc you need. which they will provide if needed. otherwise they'll just tune the car to max of your setup. anyways, i would guess for this to happen, would need like 10-15 cars. so those dreaming of turbo'ing or supercharging your ride, now's the time. other than hardware, the tuning is most impt.