I have a 2004 FX4 Super crew. I have decided I want a magnaflow exhaust. However I am not sure of the part number of the cat back system or the number of just the muffler as well. I think I want the single in and single out unless you can talk me out of it.. Help please.

 

SISO is very nice... see my other thread for some pics & details... the biggest thing with the part # is what your build date is... once you know your build date getting the part number is a piece of cake!

 

I had a local muffler shop weld on a muffler. Total cost was right at $100. bucks * parts and labor

Magnaflow 4" by 9" by 14" Body, 2-1/2" O/O (part#11236)

 

How do I know what size I want??

 

FYI I put the si/so flowmaster series 50 on my 04 fx4, picked up a noticable gain in power, also mileage I tow a camper with mine impressed with the low noise. took 45 min to install including the removal, used there clamps which are band clamps and heavy duty no need to weld.