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Re: Question about exhaust tail pipe size.
I just remembered, starting in 96 they changed the front half of the exhaust. Instead of a single into the muffler, they had a dual into the muffler (and single out). I believe the Vortecs used dual cats, so when you converted the tail pipe area you went to a dual in dual out muffler. I believe they were 2.5" on the Vortec, but may have been 2.25. I know this does not apply to your 88, but just something I remembered about them.
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