Iceman,
I just installed a set of the Pro Pipe Chromes on my 06' FLHTCI last night. Because it is an 06' and there aren't O2 sensors, I had to order a set of plugs for the sensor holes as they do not come with the pipes. Here's the exact description of what I ordered
"PLUG KIT F/SENSORS 18MM 1861-0464"
These fit perfectly so they are certainly the correct ones. I put some anti-seize on them as I figured there may be a day that I decide to move up to an auto-tuner and want to be able to remove them without damaging the header pipes if need be.
One thing to note if you are installing these yourself:
There are two mounting brackets that come with the kit. Which bracket you use is decided based on the year of your bike. This particular bracket mounts underneath the transmission after you remove the stock bracket. The confusing part about it is, that the instructions tell you which bracket to use based on the supposed part number stamped on the brackets....well, they don't (at least in my case) have part numbers stamped on them so I had to guess.
If you are 06' or earlier, you want the BIGGER of the two brackets. For 07'-08' models, you will use the SMALLER bracket.