Our price is much much lower than $1899
You'd be surprised.
I have an AE Exhaust on my 335i, which is also true dual, paid wholesale for it of course, but still over $1100
HKS TD exhausts are one of the most sought after and priciest exhaust systems in the Z market though. The sound is also unbeatable. A lot of R&D has gone into the HKS exhaust, which is why it took so long to become released.. but it's worth the wait.
I'm offering $50 installation for this exhaust, if you are in the Orlando, FL area!
-AJ
ECSpeedSound