This is just an FYI. The mounting hole under runner# 3 is extremely tight. I was unable to get a stock exhaust mani bolt to go through(do any of you guys use them on your turbo mani's?). The recess just isn't large enough. I had planned on using some ARP 45mm exhaust mani studs, but he ain't fitting either. It looks like it gonna have to be quite a bit shorter than that, and the nut is probably gonna have to be threaded before fully seating the manifold. Just a heads up.