With the exhaust turn down. Couldn't it clogged or blocked by mud or snow and back up into the cab?
Also isn't it a lot louder in the cab?
Surprizingly not. It's exactly as silent as if it had the rest of the pipe all the way out the rear quarter. I'll make a little video later today and edit it into this post so that you can hear it.
Here's the video...
You don't hear any of this in the cab because there are no low frequencies passing through the muffler. However, you do hear the three foot long intake under the hood.