where is the cheapest place to buy this? How difficult is it to install?

 

I think you are best to just order them right from nightrider.com. Price is around $110.00 with shipping. The results were well worth the price for me and it sounds like most everyone else that has commented was satisfied also.The install took me about 20 minutes. All plug and play. Just be sure to hook the ground wires to battery negative for best ground. Instructions are good. You will have no problem and the results are immediate.

 

Very pleased with XiED on my 2012 Ultra.

Easy to install. Got rid of the pinging, improved throttle response a bunch, and seemed a tad cooler.

Still running stock air cleaner and pipes.

Proof was a speedy ride to Sedona and the return up the Verde grade on I-17, and then around town at 100 plus degrees.