Has anyone installed any of the following SISO magnaflow mufflers:
5"x8" oval, 18" case
5"x8" oval, 24" case
5"x11" oval, 22" case

How loud is the sound inside and outside the vehicle?
Thanks

 

I installed the magnaflow 15609 which i believe has the 24" muffler your asking about, the incab sound is just right IMO not too loud at highway speeds to be annoying but at normal driving and startup you know right away its not stock Has a great tone at normal speeds and when you step down on it , it lets you know it there
Rob

 

i put a 4 x 9 x 18 on my 5.4, sounds sweet, no drone at speed and you can tell its a V-8 when you start it

 

Thanks for the reply. Can you hear the exhaust sound with the windows up, while driving on the freeway? My friend's SuperCrew has a Magnaflow 5"x8" with the smaller 18" case and duals out the back. The exhaust can be heard while cruising on the freeway with the windows up. I'll be installing the setup on my Expedition which is our family vehicle.
Thanks

 

As far as hearing the sound while on the highway with the windows up, Yes you can hear the sound, is it annoying in anyway, No. its not the loud sound you hear on alot of trucks as far as in cab drone. It has a nice deep tone that is not obtrusive while on long highway runs..but is great to hear in town with the windows down