1986 K20 Suburban
Federal spec, no Cats / Dual Smog pumps / EGR / Quadrajet Carb (ALL STOCK)
Stainless factory exhaust manifolds
I have a Fed spec K20 with the dual smog pumps, EGR and Air injection.
The only thing the smog pumps do is shoot air into the manifold tubes
just down stream of the...