To answer one of the previous posts, yes you can wait to purchase BMW warranties until just prior to 4/50 expiring and at ANY dealership, i.e. shop around. After the 4/50 only the PT through BMW is available.
For the sake of comparison what are the names of some trusted 3rd party companies. Heard Ford, Fidelity and few others mentioned on here.
Evolution Racewerks FMIC and Charge Pipe with TIAL-Q.
Wedge Tuned 93 Oct, K&N Panel, Conti DWS 245/275.