So three minor things to make install simple:
1. You'll want either a deep socket or a box-end wrench to tighten the clamp. 15mm if memory serves. Normal sockets won't reach over the end of the bolt
2. Tighten the clamp to where it just slides over the end of the extension to save yourself some time wrenching on it on the car.
3. The slot goes on the top. There's a weird little spike on the top of the exhaust pipe that the slot is meant for.
Super easy to install, and a perfect fit in every way. Gives the tips just the right amount of poke to look the way they should.