Is a 4-2-1 manifold better than a 4-1 manifold?

The 4-2-1 header or tri-y header is a better design. The design improves exhaust flow. They provide better flow by combining the exhaust gases slowly and in two parts which helps with scavaging. An...

i header is much better than a manifold better it will give you increased air flow horse power and gas mileage

A manifold, in systems for moving fluids or gases is a junction of pipes or channels, typically bringing one into many or many into one.

Headers. Because less or no exhaust back pressure.

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