I'm looking to replace the stock cats on my 2010 XLT 4.6. I want to go with something high flow, I also want to add some headers. The guys at the muffler shop said I would need MIL Eliminators. Does anyone know what kind I would need and where I could get them?

Thanks

 

You shouldn't need them if the high flow cats have bungs for the rear O2 sensors.