I have an HMF Penland on mine and I think it sounds awsome, oh and you need to remap, I use a TFI chip works great. Stay away from the "big Gun" it sticks out the back too far and it will get smashed.
The rocky trip I will take it easy. Dont want big brothers feeling to get hurt!! We out together last night, I was the one getting stuck in the snow, and with no winch I should be watching what I say .............