necking down after collecter?

rumblefish360 said

I don’t even think the stock 318 ever cam with a 2 inch exhaust. IIRC (LMAO @ that but....) stock exhaust tubing is 1-7/8. Correct?

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They are TCI headers if I remember correctly. The pipes going into the collector are huge, 2" is barely half the size. I'm like?????