How much sound insulation?

[vectorit]

Originally Posted by Bigdav160

The magnaflows made a HUGE difference. I was so glad to get rid of the flowmasters

I tend to believe this.
I run twin FM series 70's, and they are nice at idle.
But at highway speed, they tend to drone.

I would like to replace them with a same size muffler from Magnaflow, but it seems all they make are much smaller mufflers even if they are quieter.
Trying to avoid making my exhaust system look like a patch work of welds.