There was a guy selling tanks that fit underneath, between the frame rails... larger footprint, thin, low profile. I thought it was a interesting idea but would have to be incorporated in the design. They were a sponsor of this site for a short time, I believe. Just a FYI.There isn't a truly safe location really, put the tank behind the tub its the first to get hit from a rear collision. Moon tank up front, it's the first in a front collision.
In the middle of the car, there is a bit of a buffer even if does land in your lap.
GM spends millions of $$ on exhaust-sound research, and puts a lot of engineering know-how into the design of exhaust systems, especially for 'performance' vehicles. I'm looking forward to the systems you guys come up with.![]()