Your picture seems to show that the Curt trailer hitch # C11389 is installed correctly on your 2015 Lexus IS 350. Based on the design of the vehicle there isn't a way to make the hitch much higher without making some modifications to the vehicle. You will need to make sure that the muffler hanging brackets are attached to the bottoms of the hitch mounting brackets and not sandwiched between the hitch and vehicle frame. view full answer...
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