Hey everyone Ive got a question. Im lookin at mufflers for my car and Im either gunna run flowmaster 40s with dumps or a magnaflow dual in dual out muffler with dumps. Does the magnaflow have a built in x pipe? Also which one do you think I should go with?

Ive got a stock L98 swapped from TPI to carb, with a a edelbrock performer rpm intake and a holley 650dp with longtube headers,

Thanks
-Coltin