Yeah, now the MSA headers leak too! Anybody out there know were I can find some real headers? When I get some, I'm going to take the MSA headers to work, run them through the press and send them back to MSA!
Picked up a no rust '77 280z for $200

 

As I stated in another thread, I had the 6:1 design that MSA and others sell, and I was real happy with it. The only problem I had was it took a little work getting the exhaust hooked up because the collector ended up a little high in front of the trans crossmember. I ended up having to fab up an "s" shaped pipe. But aside from that, no leaks, ever, and I'm pretty sure the flange was about the same thickness as the manifold. It's been about 3 years since I had the car so my memory might be a bit hazy.