[Steve@SNL/Monster Clutch]

Originally Posted by jcmG8

the magic number is 2.2cfm /HP. Any more flow is a waste of money.

Here is a decent unbiased article with science behind exhaust system design

Good link...thing for others to keep in mind on a street car that runs full exhaust is that the gasses are cooling/shrinking as they travel farther away from the engine, so it can maintain velocity in a necked down exhaust as long as the mufflers aren't becoming a restriction creating back pressure which would rob power potential.