Product review (2 stars): Vent Kit Comes Up Short
After purchasing a new LG dryer, I ordered the LG side vent kit to reroute the vent out the left side of the dryer.  I previously read some of the reviews at Amazon and even confirmed with LG customer support that the part ordered was the correct kit (even though the LG owners manual lists a different part that is not available).  As a result, I knew this kit may not be a perfect fit.  Installing the kit is straight forward and I encourage the use of aluminum tape to secure all the joints as noted in the LG instructions.  As others have noted, the straight duct coming off the elbow is too short to exit the side of the dryer, but I resolved the issue by first mocking-up the assembly without the tape and temporarily installing the assembly.  I then positioned the duct that exits the dryer on the elbow at the location that would leave 1" of pipe on the outside of the dryer, and then marked the spot on the elbow where the two ducts meet.  When I removed the assembly, I found the marked location was about half way where the duct pipe would seat onto the elbow.  The fit was so loose, I didn't want to trust the tape to hold it.  So, I reversed the duct pipe and found it fit onto the elbow at the marked location without any gaps at the seam.  Of course, that meant the "wrong" side of the duct would be exiting the side of the dryer.  To address that problem, I used pliers to straighten the preformed outer ridge on the pipe and found that the flex pipe fit it perfectly.  I then used aluminum tape to the secure the reversed duct pipe onto the elbow and finished the installation.

This is a lot of trouble to address a problem caused by LG in creating this kit (especially at the price they demand).  They should simply include a longer duct pipe to guarantee an adequate fit for their dryers.