Factory Primary's Q & Extrude Honing Q

[YoungBlood]

Are factory 318 Exhaust Manifold Primaries 1 5/8"? Or smaller?

Also, who has had their Exhaust Manifolds Extrude Honed? I was checking prices at a couple places and it looks like $600+ is where I would stand

I want to make my own headers, but I am finding it to be a PITA (anyone who's tried and succeeded, hats off)

Now I am looking at using modified B-Body Manifolds or honing my 318's for Sleeperness.

Still though, Exhaust hone anyone?

Thanks,
Tyson

 

[AdamR]

not worth the money. Use a set of 71 and later 340 manifolds, They look just like 318 manifolds but have bigger ports.