I have used both Dale's and Dons pipes and I have had problems with both. I am always having to redo one of the headpipe flanges because if that is off at all you will have a muffler rubbing your driveshaft. If you heat any of the pipe too much you will burn off the aluminizing coat. It's also pretty much impossible to fit an entire prebent pipe back into a bender to tweak it some more. Lord knows I've tried! If you are buying an H-pipe you better pray that thing is deadnuts on or you're in for a cussing fit. Next time I'll request the crossover pipe come separate so that I can fit it in last.