Ok, I have read several posts that insist that we not use any galvanized metals in our smokers, grills, etc., but I am looking for a simple way to extend my exhaust pipe down to my cooking grate, and I don't want to use something fragile like a dryer vent tube. What I had in mind is a 3" flexible exhaust pipe from the auto parts store... durable yes, but it is galvanized. What are the dangers in an environment that rarely reaches 350* (normally 250-300 or so)? I'm not a metallurgist, so I'm just looking for some facts. This thread (long, but the first couple posts get to the point) seems to debunk some of the stuff I've heard, but I don't know where these guys are coming from. One claims to have galvanized metal in his grill and several people seem to think it's not a problem. Another guy says galvanized metal is safe up to welding temps. I want to mod my smoker but I'm having a hard time finding something suitable. What do ya'll think?