With 11K on my 2010 FXDC and after much research today I ordered the K&N a/c kit and a Dobeck TFI (FI-1250ST). Already have Rush 1.75 slip ons with 2" baffles. May be changing (hopefully) very soon to V&H Big Radius 2 into 2's. The installation on the TFI and the a/c looks fairly simple and I don't think I'll have too much trouble. I do have a manual as well. I'm really looking forward to the upgrade and what I hope will be a noticable performance improvement. Any tips or words of wisdom as I go forward?. I figure I've got a 5 day wait on shipping and I know that a bunch of you guys are knowledgeable on this subject. Thanks in advance for any suggestions.