Ernie - the header is a pattern setup. Can't remember the name of the fellow that made it, but when the 2300 first came out, a bunch of people used them for pattern running them inverted... which is what the header is for. This guy made a bunch of these beautiful wrap around headers and I managed to snag one new off the Marketplace. The pipe is a Macs quiet pipe I bough cheap off the Marketplace too. It had a big dent on one side, so I cut it open and straightened the dent out best I could and had it rewelded. That's why you see the heavy weld. I'm not looking for world class power - I don't fly competitively. I just want a nice strong & reliable sport engine. On that note, anyone thinking the stock setup is OK, the S.T. 2300 was much anticipated as a reasonable cost alternative to the O.S. 1.40, but after extensive service, many felt it just didn't measure up and was abandoned by most as a pattern choice. This says something too. Pattern flyers tend to be very experienced and extremely discriminating.