GW,
The cutout is actually welded into the exhaust system right behind the cat. The exhaust (when the cutout is open) then goes to the ground about the drivers seat area. You can see pictures of installations on DMH's web site. I have had the cutout for over 8 months and there has been no extra heat to the passenger compartment, or no exhaust fumes either. As far as lake pipes go I would suggest that you contact DMH Performance. They make a great product and the owner, Dave, is a great guy to work with.
Jerry
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