Hi, I have a 1992 BMW 325i, I was wandering which one to go with a performance chip by AA or JC or the ECIS intake? Any ideas on which one to go with first. I have a K&N filter cone that came with the car when I purchase it, but that was in 1996, ITs a no name brand there is a small black metal tube that connects to the cone K&N. Would the ECIS be any different peformance wise and sound wise? Any tips.