I did get them from Stage 3, Summit was a roughly 2 week wait. Stage 3 contacted Granatelli and got a set to me in a couple days. I double checked the receipt and it was $389 including shipping. Not sure where I got that other number.
I definitely feel these are put together very well. They may have a bad suspension part reputation, but I didn't see that reflected in their exhaust. The fit was fine, I removed the bolts, used WD-40 on the rubber attachments, and then bolted them back in. Way easier than trying to fit into the rubber while laying under the car.
2013 Deep Impact Blue GT Auto