Question on stepped headers??

[Matt@RFR]

What are the benefits of a stepped header? Is it simply for packaging reasons? or does it increase power or torque in any way?
Just curious, maybe you can get the power down low with a smaller primary off the head, but then step it up a notch, so when you stand on it, it breaths easier?
I don't know, I'm sure someone here can educate me!

Oh, it's WAY more complicated than that. The theory, the way I understand it, is that the steps create a low pressure area at the transition and help exhaust scavenging.

Talk to Stahl, but talk to Burns too. If you buy atleast their collectors, they'll design your headers for you with their software.