I just installed my filter last weekend. I bought the Donaldson B085011 and a 4-1/2" hose clamp. I installed a 4" turbo back at the same time which I installed a tip on. This required me to cut some of the tail pipe off. I used a 3" long piece of the 4" exhaust pipe to connect the filter. I ended up removing some of the lower half of the stock airbox to help fit the filter. Painted the pipe black and here it is.
I have the riffraff kit with the sock and it works great and took a half hr to install. Most of the time was cutting the stock airbox pieces out of the way for the filter to fit without rubbing anything.