Thanks but I managed to hide one of the bends in the darkness under the car. I only bought two bends when I (knew I) needed three. Had to use a plastic 105 mm bend and tape it in place. The rest is 100 mm air ducts, very likely what you would use to vent your clothes dryer. :D
Wasted about $60 trying to get the flexible tubing to work. The exhaust pressure puffs kept ripping it apart. :protest: