Z34 Exhaust

I am looking into getting new exhaust for my 92 Z34, I am looking at the Flowmaster 40 Delta Flows... this is going to sound stupid, but what is the diameter of the exhaust on the Z34s? I measured it around and did the calculations and got 1.9" but that doesn't seem right.

I am looking into getting new exhaust for my 92 Z34, I am looking at the Flowmaster 40 Delta Flows... this is going to sound stupid, but what is the diameter of the exhaust on the Z34s? I measured it around and did the calculations and got 1.9" but that doesn't seem right.

Probably 2" on a 3.1 or 3.4 you need no more than 2 1/4" if single, and less after it splits to duals, "if it splits" these arent really very large cubic inch engines. i think the 93 Grand Prix i had had 2" to the split, and about 1 7/8 after, course it had dual mufflers too