Mean 2017 Ram 1500!
My 2017 Ram 1500 only had 1,000 miles on it so the stock muffler came off with ease and the flowmaster bolted right up as advertised. Took me 35 minutes total and I didn't even have to jack up the truck, just crawled under it. Sounds like it supposed to now. When the MDS kicks in there is a little drone and knock but you have that with the stock muffler too, now it's just a little louder. It's not so bad that I would consider Removing the flowmaster, it just sounds too good.
Shop around for something better...
Some good and bad things about jba headers. Performance wise, definitely gave a boost in sound and power, they have a good design. Some welds are sloppy, and they dont do a good job grinding down the welds where the primary tubes meet the head flange. It's also impossible to get a socket on a third of the bolts because of the tight proximity of the primary tubes. You'll need an assortment of wrenches in 3/8 to tighten some down and try not to over torque them. Also, get some better gaskets too.