I have a 2011 RGU/103 gutted headpipe with Rinehart 3.5in slipons, Fuel Moto A/C PowerVision. I am looking at swapping out the stock cams for SE204's and am thinking about a Vance & Hines Pro Pipe, but I've been looking at the Cobra Powerport Headpipe and retaining my Rinehart slipons. What do you think, am I on the right track or should I be considering other options.

 

Any reason you are going with the S/E 204. There are better cams available. I like the Andrews 48's in my 96". Might consider the Andrews 57's in your 103. Either would work well and produce great torque and horsepower numbers. Look at some dyno curves before you make your final decision.

Personally, I'd change cams and re-evaluate before changing exhaust. My 2010 RKC runs great with Andrews 48 cams, Fuel Moto 2-1-2 head pipe, Rinehart 3.5" slipons, and PV tuner. I do like 2-1's but this bike runs so well now it doesn't need a change of exhaust.