Yeah. It was an easy install! I used a reciprocating saw with a Diablo metal cutting blade and it cut right through the piping with barely any pressure.
Like Firehawk said, if you plan on cutting out the flapper, cut in front of the flapper. The pipe bulges a bit in front of the flapper where its factory welded, so make sure to cut before it bulges (toward front of truck), it then flares a bit before straightening out. At first I cut after the bulge and the muffler didn't fit. I had to make a second cut not realizing the small flare. There is quite a bit of room to play with, don't worry about it being short.
On the backside of the muffler, cut it as flush as you can to the muffler. I used a saw so I had at least 1, if not 2 inches off the muffler since I couldn't physically get the saw any closer to make a straight cut...again, lots of room to play with.
Make sure to have a jack to hold the muffler up once you make the first cut. Make sure to check the clamps. The biggest clamp goes at the rear of the muffler. The other 2 are the same size and go on opposite ends.
It's a great muffler. Really happy with it. I can't believe how quiet it is on the highway and cruising, zero drone...but when you step on it, coupled with my S&B intake, you can really hear it. The throttle response is much better too, I had a little bit of stalling where you can feel the engine almost stutter before power delivery, now its gone. And I can't even tell if there's a change in sound with the flapper gone. It was noticeable in my 2015.
Let me know if you have any other questions.