I just got my Lexus RX330 in Dec. 2005, and I have also been looking for a tubular hitch that goes behind the muffler and not under it. I have been searching the web and found only one potential hitch by Hidden Hitch, but it looks so hefty. Did you ever find any advice on locating a light Class II hitch for your RX330? I also just want it for bikes.
kalinsandiego: My post on this forum is almost a year old... I looked at all the resources mentioned in the replies to that post last year, and ended up simply getting the Lexus trailer hitch. It's curved tubing, and has a much nicer appearance than the after-market alternatives mentioned. I actually had the after market hitch installed, and disliked the appearance enough to replace it with the Lexus supplied hitch. I think part of the problem is that these cars are nice-looking enough that new owners don't want to see them altered. Depending upon where you are in San Diego County, you can save money vs. having the dealer install the hitch by purchasing it from the dealer (no one else distributes them), and having it installed at a shop specializing in trailer hitches. There is one in Escondido in the Auto Park area north of West Valley Parkway.