The SMA Exhaust (via B&B) is available now, however due to the huge demand they are currently on backorder - shipping about 5-7 days after the order is placed.
If you would like to get one on order with us, your card will not be charged until it actually ships out to you. Obviously, if you get an order in, it locks up your spot in line for it.
For additional details see here:
http://h3source.com/store/10033001.htm
Regards,
Jason