Ive been doing some searching and im debating on replacing the stock water return line with a 6an line, depending on fitment issues.

From what ive gathered, if I go the braided route, teflon is the correct material. However, ive seen pics of most ss braided lines, and a handful of nylon braided lines. I plan on getting some DEI fireproof insulation to wrap around the line.

Ill likely have some nylon braided teflon line leftover from the fuel lines im running. Can I use this w/ DEI or should I use ss to be on the safe side?