Generator exhaust extension, after looking online at kits for $50-$200 I decided to see if I could make one to keep the generator out of the weather when camping, and it worked, made for less than $15  it's ugly but works great, hears what I used. 1) aluminum 4" gas dryer vent mount 2) 8'×4" aluminum vent hose 3) 1 tube of Quick Steal epoxy  That's it , I used a dremmel to remove the paint on the muffler so the Quick Steal had a good mounting surface. The photos explain the process it's supper easy.