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3.75" x 4" on the TB side (inside diameter)
4 1/4 x 4 3/4"" on the airbridge side (inside diameter)
5 1/4" length
Just measured it. It fit perfectly with the stock TB and stock airbridge. I kept it when I sold the car. This size fis all '97 - '00 Corvettes only. If interested I will sell you mine otherwise these are the measuremnts you need.