Muffler question

If I want a Super 40 Series muffler from flowmaster, which one fits a 98 Ford Expedition?

I really dont know which one fits but i have the 40 Series flowmaster dual exhaust on my 98 expedition xlt. I also have air intake K&N air filter. They look / sound / and make the truck run cooler. good luck, al

Just had mine done with duals also and k&n filter, sounds great. You need the 430402 flowmaster muffler. Also one more thing. If your looking for that big dodge sound that the flowmaster gives the dodge, your not going to get it, because the expedition has two catalytic converters instead of one. You have to change them to high flow cats. Peace and good luck.

Love my Expo.