Does anyone know of a website that gives most of the different muffler manufacturers flow rates?

Also has anyone installed a Flowmaster 60 series muffler on their car? They claim it's designed for small 4 and 6 cylinder engines and increases HP and torque. I have heard one on a Handa and it sounded great so now I'm curious how it performs.

I understand everyone is going to tell me to use what they use but I don't want to hear that I'd like to know what really works and what is a waste of money.

Thanks in advance. smile.gif

 

Walker (dynomax) does list their muffler flow rate and theorical HP in their catalogs
they migh do the same on their web site

Denis