<https://ck5.com/forums/threads/exhaust-diameter.99750/>
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"i have a 1995 gm 350 crate motor and i am going to run hedman long tube headers and duel exhaust out the back with a cat and flowmaster 40 on each side.  i will install a cross over pipe - where it will fit best.  my question is, should i go 2.5..."
<https://ck5.com/forums/threads/exhaust-diameter.99750/>