[jaxlrs]

I have a 2006 K1200S. Has anyone had this combination?

 

[Beech]

I'm in the no K&N filter camp. Passes too much dirt. If your concerned with stock filter prices there are locations that sell the OEM filter under the Mahle name at about half price.

 

[SteveMac]

Yes - nearly

I had a Power Commander 3, Staintune pipe and K&N filters on my 2005.
I clean and oil the K&N filters so that they work properly, I love the sound of the open pipe, and I ditched the Power Commander.
Ditching the Power Commander was the best thing ever - it is much better to ride without it. The low rpm torque was great with the PC but everything else was terrible.

 

[Corkboy]

Don't have a powercommander, but have a AF-XIED which transforms the bike, and is adjustable to cater for the aftermarket exhaust and/or higher flowing filter.