Greetings!

On the Mac's Products website, they claim that getting max rpms by finding the right length of the header pipe is the way to go. (before adding expansion chamber, mousse can, etc.)

How can that be, when the expansion chamber part of the tuned pipe has many variables in it's design, and then rpm figures must be checked again when using the whole tuned pipe system, not just the header??

Actually I am a sport flier that will be attaching a mousse can setup to the header, but I thought you guys would have the most experience.

Thanks!

Ernie