If So How Does It Sound Trying To Make Up My Mind On Magnaflow Or Mbrp Cool Duals.

I saw the Magnaflow duals on a diesel shop owners Truck this weekend at the track. Looks and sounds nice. He said installed the price is $795 (I think) . I don't know what metal material I was looking at though.
By the way that Truck ran a 7.61 at 91 mph in the 1/8th