[Bruce Edwards]

Neil,

We use a slip fit on the headers when we build them in house. All of the header pipes are separate to make it easy to get them on and off the engine as well as the sidepipes. With a deep slip fit on the pipe it can move in and out a bit as the engine moves but can not pull out. It is hooked to the rear of the car with a rubber insulator held in place with a bolt fit into the sidepipe flange. I have thought about adding a spring set up like on some old bikes but never had a problem with them so never bothered.