Small Block Exhaust Manifolds
Is there any difference on factory cast manifolds on small blocks?
Not minor changes, but things like outlet size, performance...
Also did single and dual exhaust get the same manifolds? (Was there any other difference other than y-pipe back?)
I am only asking about ones that work in Chevelles, not the Rams Horns/vette manifolds.
1967 El Camino Malibu - Deepwater Blue
ZZ4 350, FiTech 600 complete!,Roadmaster tank, 700R4, Underdash A/C in progress, JGC Steering, 1990s truck serpentine.