I know it's not the coolest thing in the world but this is my first headpipe. A guy I know had stuck a 350x motor in a 250x frame and didn't want to fork out the dough for a powroll system. I offered to take on the task for a fraction of the cost and this is what I made. The primaries are the same size as the stock 350x's but just a hair longer to move the power closer to the mid. The main pipe was made to go to the stock location of the 250x/300ex muffler so one could use any 300ex muffler they wanted. The only mod needed for the 300ex muffler to work is the opening needed to be enlarged to accept the bigger pipe. Not a bad mod, just heat it up and drive a pin into it. I ended up picking up what looks to be a brand new HMF muffler off of ebay and made it fit. Over all I think it turned out great. It sounds great and everything fits great.
On a side note I've never been a big HMF fan but I gotta say, this is one nicely crafted silencer/muffler.