a nos pro sportsman fogger. with the nos control unit that controls it with your tps. don't waste your time and money on anything else..it is the safest and most consistant for the bmw. you should be able to run a 100 shot start at 50 and work your way up..i wouldn't do any more with out modifiactions to the fuel system.. if you do its your car's funeral..
also get a chip burn't for n2o too if you can find one or if you are post "97" and are running obdII then send your comp off to AA and get it flashed for your set up.
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