Yea I was surprised to see how much of a reduction there was in pipe I.d inside the resonatorgmcman said:I had the Walker Quiet flow and I lost 2-3MPG over stock. There's another Walker that another rmember used and had good results. The Quiet flow has a much smaller diameter in the muffler, not sure about the resonator but my best MPG's was with the OE system.
Wow that's horrible and seeing how the resonator was connected to the exhaust I'm guessing it was a whole bolt on and the muffler may of been too I got to checkgmcman said:You should see the muffler, it chokes the 2.5 or 2.75" ID we have down to about 1 1/2"
Needless to say I got rid of it rather quickly.
Mines is a one piece from the muffler. iirc there is no flange between the two so I definitely need to checkgmcman said:The OE is a 1 piece welded unit, the Walker is in 2 pieces with bolt on flanges. I'm not sure if it's labeled on the top or not.
Here's my thread on it.
Yea the mpg's great at highway speeds but at city it's amazing how fast it can drop. I need to move upstate lolgmcman said:If you're getting 18.6 MPG between 75 and 85 MPH, then I would think everything is working fine at hwy speeds for sure. The published 20 MPG surely isn't at 75 MPH. [emoji2]