header/exhaust circumference

On a 350, can anyone tell me what the distance around the stock header is and the distance around the stock exhaust tip? I'm trying to figure out if this is a stock exhaust or not....it seems bigger. Any pics of a stock 1985 iroc z28 exhaust will reallyyyy help.

Thanks,
Ed

you should know depending on the model and mileage....it will be very small and rusty.

:D

however according to my manual the stock tai pipe o.d. and wall thickness was 63.5 x 1.07 mm or 2.75 x o.o5 in. however this is 1991 gm specs. there is no data on the stock MANIFOLD however, you should not have headers if it's stock.