I think some change is to be expected but that’s pretty significant. Do you know the weight difference between the two tires? Did you recalibrate the speedometer with Forscan?
Yes, it produces the same sound sitting still when the engine revs just a little above 3000 rpm. I’ve sent an email to Magnaflow but have not heard anything yet. Going back to the muffler shop that installed it next week.
Ok. Thanks for letting me know. I need to stop by the local dealership one day next week to buy a case of oil and a filter. I’ll ask what they use. I’ll let you know.
You can make DIY maintenance entries on Carfax as well as FordPass. You can also add a screenshot of the receipt. Just download the Carfax app and set up an account with the VIN.