Thanks Jason.
Yep, they are 1.75" primaries. They are from Art Morrison for their (and your) new subframe. They're really nice.
I've been talking to Kooks about a set of conversion headers. As you know, the exhaust ports on the LS7 are different from the standard LS port and I'd like a bigger primary. Although I wouldn't be scared to run the Art Morrison headers I have now.
