I have the RC level kit in mine, and even with a wdh my xd would squat a good 2" when hooking up my bumper pull toy hauler.
I ordered the Timbren kit last Friday, as my new fifth wheel will be arriving in 2 weeks. I wish I had seen these Sumos before ordering, BUT Timbren seems to have good customer service and will make things right if needed.
FWIW the Timbren rep I talked to said the part # they've been recommending to others should be ok w/my level kit as well, based upon the measurements I gave them. Sounds like I'll have a bit more gap before the frame hits them, which should actually provide for an even better ride when unloaded...time will tell, and if need be I'll swap over to these Sumos later if your guys rave about them.
2016 XD SL PEARL WHITE