Mine is a BRC system on a 2003 7 series BMW, was fitted on aquasision and has been faultless, and is very economical for a 4.3 V8. The only snag is that they fitted a doughnut tank in the wheelwell so you don't have room for spare, but worse then that, if you need the battery out then the tank has to come out too. Not much thought went into the planniong I suspect.
I used to have the 2.3 Scorpio on a 99 plate which I had installed myself, it was the Prinz VSI sequencial which cost 2 grand to have done, 90 litre boot mounted tank, that was BRILLIANT I could go from Hull to Plymouth on one fill, cheap as chips.
Pete
