I understand exactly what you refering to. Most header design theory I read expresses the need to keep velocity up on the escaping gases and the scavaging affect. It is a whole lot of voodoo if you ask me. Fluid dynamics... all that jazz. Add a custom ported head to the mix and you can change everyting. I do understand the basics though. No 3" inch for this car. 2.5 after the CAT. Because it will be supercharged the exhaust side will need to breath free, but not like a big dump for a turbo outlet.

I may eventually have a custom N1 Dual type cat back on the car...but thats down the road. For now I just hope this header does its job and stays whole until the plate for the SC is finsihed.

This weekend will be devoted to pulling a subframe. Next weekend the header will go on...I hope.