Nice picture and custom plates Greg.
However, as much as I like bikes, I'd prefer to see your Lingenfelter 383's rear end rather than the Yamaha R1 in front of it.
As to the HP gains, I'd say you are looking at about 40 hp increase.
The need to fab a hook up with a cat back to headers is common, especially with no cats. I have Watson headers, and needed to have collectors fabricated to my B & B system. Any good muffler shop can do it with very little time and cost involved.
