Ok I hav got the basics of tuning down but for some reason my Tahoe seems like it is still pulling in too much air, sort of bogging low end. Does anyone know anybody in New England prefer Ma, NH or ME that might be able to do a tune for me. I am in military and leaving again soon and just want this tuned the best it can be before I leave. I just don't have the time with gettting house ready and all kinds of crap. Appreciate the help guys.