alright this is not just another flowmaster vs magnaflow thing (well almost)

i have two sets magnaflows and flowmaster 40's, which one of those would give me the least restrictions? i'm not too crazy about sound but i do want the most power i can get from ether

 

Magnaflow will outflow the Blowmaster any day, any time, anywhere

 

I personally would prefer magnaflow over flowmaster.

 

I've got a hooker aerochamber 3" catback on my car - I've never used a magnaflow, but, I did have a flowmaster exhaust before installing this. I didn't like the way that sounded, so I switched. This new setup has an excellent tone, but is actually quieter than the flowmaster and the car hasn't lost any power; in fact, the car seems to launch a little better.