There is an adapter that you have to order to use Kuryankyn foot pegs with the Raider, not sure on the other manufacturers. The part # for the Kuryakyn adapters is 8802 for the front and 8809 for the rear.
Also you may be careful ordering that 3" kit from ebay. I have heard that the shift linkage has no adjustment nuts and is to short to be connected properly. Also it is just machined aluminum not polished or chrome. All good things to know before you order them.I emailed the seller with all of these questions over 3 weeks ago and never recieved an answer back, so I assume he has not fixed any of this.