The cars I have seen do cover the exhaust but I totally agree with the comments to think safety first.. maybe twice before modding. Good points. I was thinking of going just past the cab and leaving it open for it to "vent " at the back somewhere.. None of it "air tight".. but better than what it is.
If you do something like this, please share. I'm always impressed with the innovation and thinking outside of the box that happens here.
