Review on ๐ MagnaFlow Universal Standard Grade Catalytic Converter 59959 - Stainless Steel, 3in Inlet/Outlet Diameter, 8in Overall Length, No O2 Sensor - EPA Compliant Replacement by Marquez Hinshaw
Helped improve the performance of my Excursion 5.4 low power petrol SUV
Can't tell how much this alone helped as I also converted Ford's factory 90 degree Y pipe to a true open Y pipe and removed the resonator. Installed a 3" rear pipe muffler and a ProFlow muffler. Single exhaust. But now it's a more productive truck. And on the highway it gets 1-2 mpg more. Now it sounds like a truck too, but not too loud.
- . Absolutely amazing!
- Functionality
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