I ordered this hitch from AutoAssessoriesGarage.com and it arrived really quick. I bought the hitch #12231 to mount on my 2001 Lexus LS430. I tried to install it mostly by myself with my brother helping to lift it while I screwed on the bolts.
This hitch is designed too tight a fit and is impossible to install and match the bolt holes, even when leaving one side loosened to make slight adjustment. The rear of the hitch was smashing my gas tank as it was being bolted up so I had to remove the entire hitch and shave off about 1/4" off the back of the hitch. I used a dremel with the cutting wheel and it took about 30 minutes to cut and sand. I cut it in an angle going down just to clear the gas tank. I also repainted it black to match the rest of the hitch. I also enlarged the bolt holes using a dremel bit and made it slightly bigger to allow some play when installing.
It took me 3 days to install and a total of 9 hours going back and forth due to not properly fitting. Make sure to add some WD40 to the bolt holes and to hand tighten before using a ratchet. This will prevent stripping of the bolt holes if it goes in slightly in an angle. I almost stripped one hole but backed off after I noticed it was not going into the hole perfectly straight. I installed one side without the washers so the bolts can be tightened up a little on one side in order to get the other side raised higher. The rubber muffler large O ring mounts makes it a little difficult to install.
Once you get one side in without the washers, you can add the washers to the other side and install normally. Then remove the bolt without the washers, then add the washers to them and install. It's really a tight fit but once it's installed all is solid. I also used a torque wrench to torque all the bolts to spec. Just be prepared to do some modification if yours doesn't fit right. The dremel tool really helped a lot.