I am going to put high flow cats on my car. I was thinking about going with the Kinetix high flow cats. Will these make my car a lot louder?? Currently i have nismo headers and catback. How much louder will these make my car because every site says it will make it a little louder. Is this true?

 

High-flow catalytic converters will increase exhaust flow, and also increase the noise level.

 

If its any measure, I have unresonated test pipes on my car now and am going to high-flow cats because its too loud and raspy. And the smell is annoying too.

Mine have come in, just have yet to install them. I will let you know how it sounds when I have them on.