Can I use 318 exhaust manifold on 340?

pishta said
Those dyno numbers are from a stock motor? 311hp-400 ft/lbs from a teen? The more you cam, the more important a good exhaust becomes. Stock can exhale through a straw.

What do you mean by "Stock can exhale through a straw". Do you mean that if your engine is stock all you need is small exhaust manifolds??

treblig