Easy job:
raise bike. Loosen clamp from cat to muffler, slide onto muffler. Remove the 3, 10mm bolts from the bracket the prongs from the cat go into. Remove the 3 springs from the cat to the header. We use parachute cord around the hook of the spring, and pull aft. Helps to have a helper! Now, support the cat, and push the rubber hanger (donut) off the hook on top of the cat. I use a 16” extension. Remove cat. Harvest the black bracket with the grommets, install on bypass pipe. If it has the hook from the donut, do that first. Re install black bracket with the 3 10mm bolts. Hook the springs back up. Put pipe into muffler, install clamp. Let it idle for 10 minutes to let the ECM learn the new pipe. Go ride!
Nice part, nice welds. Like it a lot. Call if you need to. Joe