Review on Flowmaster 943051 Delta Flow Muffler by Matt Conner

I bought a Flowmaster 943051 50 Delta Flow Muffler to fit a 2008 Infiniti G35x Sedan. It has a special 3" single exhaust with double glazing in the resonator position and that Flowmaster muffler in the back in its original position. "Drone". This hum runs at around 125 Hz, which for this 6 cylinder engine equates to around 7500 pulses per minute or 2500 rpm. I've found that if I add a foot or more of exhaust pipe, the hum almost goes away. I can't do that because the muffler is on the rear bumper. This muffler replaced a dual chamber muffler similar to the 40 series Flowmaster that had a terrible rumble at the same rpm. This 50 series delta flow is much better but still quite annoying in my opinion. Hum aside, this muffler is good. Flow is great and I got some mpg. It sounds great when I sit on it and pull hard all the way to the 7600 rpm red line. Not loud, but definitely breathes a lot better than those cars' puny OEM dual exhaust. e s. At a speed of 70 km/h the exhaust is quiet. If you like a loud exhaust, this muffler is probably too quiet for you. In addition, this Flowmaster muffler is made in China.