Talked to Koolaid at Kook's and they are now finally offering a 3"non-catted headpipe (Test pipe) for guys already running a Kook's Catted setup without buying the whole x-pipe assembly. Basically you get the two front pieces that attach to the x-pipe assembly.

Part # 6712-OX-FRONTCONN - COST 250.00 retail

I am getting a pair and running it in conjunction with the new merge collectors I welded on my Kook's. The merges are a 2 3/8" neck to 3" collector. With the 1 7/8 on a 6.0, this should be worth some power.