My trailer flaps I mount to the hitch are the “rock tamers” brand, and have had them since 2010/2011, they have been used across many trucks and likely at some point I’ll have to get a new set as age and modifications are adding up. I’m hoping the exhaust doesn’t wreck them, I got away with the rear exit on my current trail boss luckily, even in 100f weather pulling in hills, but it’ll be interesting to see how this works, when I had my 2012 Chevy 3500, I actually cut the exhaust on the truck and put a turn out to blow it out behind the rear tire. I’d prefer to not to that this time around though.