Where can i Find A Performence Chip for my 1983 733i? I've been looking everywhere but to no luck i couldnt find a anyone that makes on for my car it would be alot of help if someone could tell me someone that does support my car

Bavarian Autosports has chips but I don't know which engines they fit. They're at bavauto.com and 800-535-2002. Also try a Google search with "performance chips". You'll get lots of hits.