have 3" DP's so i would have to get Labree to setup a custom 2.5"-3" Hi flow cat pipe. Then later down the road i could just switch the DP's and cut off the 2.5-3" flare and go straight 3". Im still debating because i do realize how rare the Genie exhaust is, so for now its just time to built my motor. I can worry about exhaust after the motor is broke in.
Hopefully more people will give me some input on exhaust. I hate to say it but i have thought HKS Hi-power just because of the straight flow to them.