I ended up trimming one side(y-pipe or I-pipe) and then got a 3" junction pipe from Autozone or Pep Boys and some extra clamps. I had to do the same thing on my old 96 SS. I hate the 2-3/4" neckdown on the y-pipe so I cut it off completely to run full 3".
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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