Turner - Congrats!
I've got the D&G long pipe. It's awesome, big power increase and the bike sounds like it should.

You will need to rejet with it. I just grabbed a couple larger pilot jets and will be trying them this weekend.

This is an old vid of mine with the D&G pipe.
http://www.flickr.com/photos/kb96gt/5564888553/

I polished it and added a 4" baffle. Will get a new vid after I install the new pilot jet.