Which is better Flowmaster or Magnaflow? How much extra horsepower can i get from them?

Which is better Flowmaster or Magnaflow? How much extra horsepower can i get from them?|||We went to Midas and got a Flowmaster put on our Dodge Truck...dual exaust and a K and N filter put in, and now our truck sounds great and gets better gas mileage...also seems like it has more horsepower...Have fun!! Don't go to Meinicke they tried to rip us off!!|||What is the year make and model of the vehicle? What size engine? What modifcations have been made to this otherwise stock vehicle? Is it California or Federal emissions? What are you trying to accomplish-ten second quarter miles or just annoying the cops and killing yourself?|||Magna who? Never heard of it bud... flowmaster is the way to go. Think about it.|||hmm, my ex used to like magnaflow. i dont know about horse power though. he used to say that exhausts only add about 10 horsepower...hope that helps...|||Flowmaster, hp?