You could...but most people just use flex liner the whole way...make sure you spring for the insulation blanket for it too...provides a nice performance increase and also makes the liner "legal"...helps the liner run/stay cleaner too.
OK thanks. I see they make an insulated flex liner. Is that the way to go or is the wrapped blanket a better option?
I've used both...I really like the pre-insulated stuff, but it is a lil more money too...if you have a tough install I'd recommend it though...it will take a little more "install abuse" too.