hey folkes,

although im not sure of the exact model i just got dual flowmasters with a force muffler on my 2004 5.4 L.

any opinions on how itll sounds? or vids?

ill get pics on tues. after the install.

hoping for it to roar but not poppy.

 

I'd like to find a muffler that makes my 5.4 sound deep and throaty like the flowmasters on the mustangs... the mustang is still a 4.6 or something right? anyone know what model will do that on the 5.4?

post a sound clip when your done your install and let us know the model, Thanks

 

All I know is that with their dumb sound baffles in the their mufflers you lose low end torque.

 

Depends on whether you got the duals, or the single. The duals are louder. I have them on my 07 KR. Its the third vehicle I put them on. I cannot speak to the power loss or gains...they just sound cool

As to losing low end torque...believe half of what you see, and none of what you hear.

 

I have the 3 chamber Flowmaster and it has a nice rumble when you get on it. I dont know what model will get you what you are looking for but I am sure Flowmaster can get you the sound you want. All the negative posts will be from those with the Magnaflow mufflers. There is a post on here that shows the difference in various types of mufflers and the difference in the two is negligible in the lower rpm range and not that big in the upper rpms.

 

Please, enlighten me...

 

You will loose low end TQ I did see proof on the dyno at Mike T's get a Magnaflow you will be happy with it, I also had a slowmaster on my 04 and it rusted bad in about 4 months

 

I have a 50 series on my '01 5.4 and I can spin the tires from a stand still with ease ( and I have 3.55 LS gears on 40 series 20 inch tires)

my wife loves the sound of the flowmsater and it's been on almost 3 years without any issues

there's a bunch of F-150's on youtube with sounds clips and videos

 

I had Flowmasters on my last truck. Eight years, and no rust...

You live in Jersey...what does not rust?

 

I have had a Flowmaster SI/SO since 09/2001. It was originally installed on my '86 Ford Bronco, but was then refurbished and put on my Expedition. Outside of repainting and re-welding the outlet pipes it's been great. My Exp. had been Supercharged and still worked great with respect to power. I was looking for throttle response from the Exp since a louder muffler created too much drone noise in a vehicle of that type.

 

My Magnaflows dont

 

I have a flowmaster and hate it. Sounds great but I lost so much power compared to my Magnaflow. Low end power that is, over all I would go with a Magnaflow on the 5.4L

 

OP, it will sound great.

Flows all the way

 

I don't know maybe its a Redneck thing, but the only way Flows sound worth a damn is dumped. Also they only make 2 mufflers that I like the sound of, 1 original Flow 40, 2 the 10 series race muffler, with the second sounding much better than the first. Personally there are only 2 exhaust I will run on a truck one is true duals x-pipe with dynomax race bullets through 3.5" tips, the other is true duals x-pipe straights through 3.5" tips. These are the best 2 sounding exhaust I have heard on the 5.4.
Blake

 

Flowmaster 40 series is what I plan to put on my truck soon.