Review on 🚗 Flowmaster 942442 2.25 Inlet/Outlet 40 Series Dual Flow Muffler by Ron Long

Sure. I installed it in line with a Magnaflow 91005 (generic) catalytic converter to maintain exhaust back pressure for the 02 manifold sensor on my 89. Jeep Cherokee, but the difference in performance is mind-boggling! The exhaust noise is a bit louder, but not unpleasant. More like a whoosh in the exhaust pipe. I have used Flowmaster mufflers on several vehicles so I know what they can do for an engine. The biggest performance note was on the acceleration curve ('stepping on it') and I got a few mpg. house in the night! The motor is noisy when first started, but much quieter during operation.