51502-09 - Rumble Collection Passenger Footboard Insert - Swept Wing
51510-09 - Rumble Collection Passenger Footboard Insert - Swept Wing
(one of these is right side, one is left side so you need both)
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Choose 1:
50357-04 - Swept Wing Passenger Footboard Pan Kit - Grooved
- or -
50716-04 - Swept Wing Passenger Footboard Pan Kit - Smooth
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Choose 1:
50768-07 - Adjustable Chrome Passenger Footboard Brackets
- or -
53070-00 - Chrome Passenger Footboard Brackets
What Guilty said.
Here's a picture of my '08 SERK with the Ironside conversion.




Be prepared though, without discount all the pieces total over $600.00.
You can do this a bit cheaper if you just buy the standard non adjustable mounting brackets. But my wife had issues with short legs and having the rear boards adjustable up, down, front to back, made all the difference. By my pictures, you can see you can even tilt the rear boards to match the front board angle.
Good luck.
One last thing. I wanted highway pegs so I bought the Ironside front highway pegs and mounts for almost $200.00. I had them on about 2 weeks and we decided to do the rear boards. Now I have an extra set of Ironside pegs and I could have saved myself another couple hundred bucks. Just a word to the wise.
I'm sure your BSR will appreciate the new boards as they allow them to move their feet to change their position once in a while. BUT you cannot add the swinging highway foot rests to the adjustable mounts like in the pictures. They only mount to the stock non adjustable mounting brackets.
Again good luck and look for 20% off when you buy.