I have a streetport,gt35r,borla resonated midpipe, and an hks carbon ti catback. The exhaust resonates badly inside the car at cruise. I was wondering if anyone has tried both a borla and a magnaflow on the same setup, if so,which one killed more of the in car resonation?

 

Magnaflow, without a doubt.

 

I had a custom 3.5" magnaflow system built for my old car. I talked to a couple fabricators about their experience with both brands. They said the magnaflow mufflers are quieter.

 

magnaflow is quality stuff
never checked out a borla in person

 

I haven't experienced the Borla,but I am running a Magnaflow catback on my FD and it's pretty aggressive sounding,but not annoying while cruising,and that's what I was looking for.