Walker “Sound FX” vs “Quite Flow 3” mufflers

FWIW, the car is a ‘66 Charger w/a 318-2 bbl poly, 727 & 2.84 gears on stock tires.

I am trying to get and have a line on a 2bbl intake as currently it’s a 600 cfm 4bbl Competition series Carter on a factory 4bbl. intake.

I just want to return it to stock.