Why do you want to know? What knowledge will you gain from the diameter? Where do you want folks to measure? Are you OK with the fact that different areas of the exhaust will have different diameters? Do you know that if you increase the diameter on the exhaust, you will lose power?
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SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.
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