Did you look at the delta header and muffler I have there head pipe with a custom fit yz250f muffler and promoto end cap header is good fit http://www.wheelingcyclesupply.com/s...ory&cat_id=128

 

the delta does look nice but i can't seem to any info on it.

 

That guy would be me, I gotta tell you at first I was a tad shocked by the sound. It definitely is loud, but sounds pretty sweet (that has to be the first time I've ever said that about a loud exhaust in my life, I'm usually conservative). The P1X powertip for it is definitely loud, I actually called Two Brothers and talked to a rep out there who told me the P3 is quieter, but discontinued. A quick trip to ebay and my P3 tip is in the mail, I will give an update as to how much quieter it becomes. But so far, I actually like it... does worry me about damaging my hearing and making neighbors angry though.

 

delta header spec download drc 09 catalog specs at end of catalog http://www.drcproducts.com/download/index.html