"Wow what an impressive exhaust! My Ford F350 Powerstroke Diesel hawls like a beast. I replaced my stock muffler with the Aero Turbine 4040 muffler and some straight pipe by just simply clamping it on, the Truck sounds great, runs great, and can't believe what it is saving me at the gas pump. It just about paid for itself in the fuel savings. I have tested several mufflers on my other diesel trucks and vehicles and all I can say is if anyone is thinking about getting a Magnaflow, a Flowmaster, or Borla sytem, I can guarantee that the Aero Exhaust will blow anything they have out of the water."