Im lookin for just a replacement muffler to fit in the stocker, 5.4 3 valve supercrew, dont want a full exhaust or a catback, just want to cut out the stock muffler n weld in a magnaflow, any idea what part number/length/inlet outlet/ etc for this? the magnaflow website doesnt seem to be helping me

 

I just got mine installed today, didn't get the part number but the guy at the muffler shop looked at it and rattled off the number. Took the stocker off and welded it on in about 15 minutes cost about $130 out the door. It sounds exactly like I hoped it would, not to loud just a nice rumble at idle and actually the Airaid intake makes more noise on hard accell than the muffler does! You won't be dissapointed!

 

being a 5.4L i'm betting you have 2.5" pipes, take a tape measurer to your tip and measure, then just buy a si/so Magnaflow muffler and dump it