If you want the best customer and tech service. Give Berrel Auto in Abington, PA (about 10 miles north of Philadelphia) a call. They have been a FAST dealer since the company was started. They probably aren't the cheapest around but they will not forget about you after you buy a system. I know for a fact that they tuned a FAST on a twin turbo 18 degree headed small block Chevy in a street car that made 1000 RWHP. Call them on Monday at 215-659-8549 and ask for Dale or Chris.