Since our assumed exhaust flow passes through primary header pipes ... As pointed out elsewhere in this story, stepped pipes and multiple pipe sizes can be used to pinpoint rpm points at which ...

But for sizing or matching primary pipes to specific engine sizes and rpm ... There is much more to the science of exhaust-system tuning and headers that space does not allow us to include.

An exhaust manifold is a set of iron pipes that lead from your car's cylinder ... thus limiting the amount of air they can carry to their dimensions. On the other hand, headers are aftermarket ...

What is it about exhaust scavenging, headers, and systems that leave us in a perpetual fog? Shorty ... medium ... long-tube? Pipe size? What collector type? Which is ...

However, without the help of a properly flowing exhaust system ... we'll compare four popular small-block headers with different primary pipe sizes on a stout street/strip crate engine.