the tornado is a scam. the theory is sound (maybe for a deisel), but in practice it doesn't work and in independant tests it
reduced hp and torque in some cars. CD did a test on this and their test 540i lost hp. there have been problems with the unit interfering with or jamming open/closed the TB. Last time i checked, this company had a few suits pending. no joke. save your money . . . . unless you think water passing from one 2 liter bottle to another will help you
