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I have a 2008 FX-4, and the muffler just rusted through on the out end, and is half rusted on the inlet side. I brought it to the local muffler shop and they said they'd install a new "Flowmaster" for $325. NO WAY! I wasn't aware the muffler was a Flowmaster, because I bought the truck used. Doing some research, I have the "Center in - Dual out" muffler. I'm not sure if I have the size 2.5in in with 2.25in out, or 3in in and 2.5in out. Those measurements are too close to each other to tell. How do I figure that out? I can buy an new Super 10 online for $76 free shipping.

The muffler shop guy said it was a Flowmaster, yet I can't find Flowmaster stamped on it anywhere. The only marks on the muffler are on the inlet side, where it says "inlet." Thanks guys.

mavrik2747

You can get the Summit Racing muffler (SUM-630142) which is very similar to the Flowmaster 10 for $35.

Project_Red

I just got the muffler from summit and it's not loud it's really deep though it's awesome

techrep

iTrader: (1)

If you have stock pipe running to the inlet side it's 2.5" and just measure the outlet side at the tail pipe.