I have a set of Spitfire headers that I bought for my Dart but did not use. They look o.k. but require a good muffler man to hook up. The passenger side works o.k. The driver's side exits partially into the steering column. There is a few inches between the two, but it is tight. I talked to Steve Strope of Pure Vision about them since were used on the Dust'ya car, and his comment was that they were tight, but worked pretty good. They are deffinently not for high horse power cars though. The primaries are like 1 5/8", and the collectors are 2 1/2". Look up the december 2002 issue of Mopar Muscle to see them in the car.