autoalain

Folks, bought 71 454, is there a smog pump on 71 that goes to exhaust
manifold, no exhaust of car now, want to put headers bur worried about
inspection, Thanks Mike.

dzhrp7

Hedman markets 2" primary headers for BBC that accept the A.I.R. sytem (smog pump). They are available coated, or painted. See part numbers 68091, 66891, or 63198.

MelWff

there is no exemption for older cars in Quebec?

mrichi

I just put pre smog cast manifolds on my 454 ,unless you are wanting to run your motor high up in the rev range extractors won't make much difference . With the BB motor taking up more room in the engine bay I found the cast manifolds very good, the shorty block hugger headers would also be similar to the factory cast manifolds