The PA 12.5 head is for 0-3000 ft. and on their website it's listed for $355 US POLARIS CFI 800 HEAD, Power Addiction Racing
I'm getting an HPS can for my 2013 Pro and thinking about getting the 12.5 head as well.
I've also bought MTX 71g clutch weights with two 2g rivets installed, and the blue/pink SLP clutch spring. I'm picking up my sled next Friday so I'll install the clutch parts next Saturday. Then I gotta wait for my can. A friend from work is picking one up for me in Edmonton and I'll get it from him when I see him at work next month. I'll probably hold off on getting the head for a while. Been spending WAY too much money lately