Product review (1 stars): Skip this one and go to HD
Such an overpriced product that I thought I would just so this with 4 inch vent pipe... And success! Don't waste your money on this. Just pull the old vent pipe out of the rear and measure and cut to length with a hacksaw for the new output hole. Cut the wide end and flare the edges with a pair of pliers. Use te pliers to remove the tacked on braket too. Test fit over the blower output. It should wiggle in about 1 inch max. Add a 90 from Home Depot which fits over the original pipe easily. The 90 has 4 parts so put it in straight then rotate inside the machine to get the angle. I vented out the bottom so that's all I needed! It can push up so you can slide the dryer into place then pull the 90 down a little from underneath ( assuming basement access). I don't see a need for tape as the 90 fits over the pipe by 2-3 inches and it's all solid smooth pipe. If you need side venting just add a straight length of pipe off the 90 and out of the machine.

Hope this helps someone out there wondering if it would work!