Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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I'd go with the 1 7/8" primary tube size, after all it is measured O.D.(outside diameter). The I.D.(inside diameter) would be very close to 1 3/4". Best of both worlds and easier to find. Hooker & a lot of other makes use 1 7/8" as standard, and Hookers clear everything!
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