Well Daniel I hate to be the bearer of bad news, but you're actually not going to be able to use any of those Euro style ball mounts with your Curt Trailer Hitch Receiver # C11372. This is a class I hitch and the drawbar(s) you're looking at are for class II hitches which may have the same receiver openings, but they can not be used together - the ball mount will not fit all the way because there is a built in tab/stopper to prevent you from doing this.
It looks like all that's offered... view full answer...
There is not an adapter harness for your 2007 Lexus GS430. To hardwire this controller to your system you can use the Replacement Brake Control Plug-In Harness for Tekonsha and Draw-Tite Brake Controller 12" Long # 20127 to allow you to use the controller between two vehicles with the quick disconnect.
I don't see the wiring needed for your vehicle to use a brake controller, so you will need to do some custom wiring. If you don't have a 4-way flat connection, I recommend the ZCI Circuit... view full answer...
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