Since I will be installing the Akrapovic muffler soon, and my diffuser wrapping wasn't exceptional, and
flapjack had some great pix of his diffuser on his build thread, I decided to purchase a carbon fiber diffuser.
Because I am dropping in a brand name exhaust, I thought I wouldn't skimp and decided to install a Vorsteiner diffuser. I hit every website that listed it in stock or not. None in stock. I did find one broken, but they claimed it was demolished. SO, I had to go with a replica, which saved me almost $1k from a Vorsteiner, so I'm not too disappointed. I spent less than $500 shipped and it arrived in 15 days (order to front door), despite claiming months for delivery.
Their communication was spotty at best and I'm still not sure it mounts without double sided tape, but that's what they claim. I haven't installed yet, but I can say the carbon fiber quality exceeded my expectations, FWIW. The real question is how it fits, so I'll report back once I go through that process.
