has anybody cut out their stock muffler and welded in a flowmaster? how does it sound, i have a xlt screw with the 4.6

 

I did that exact thing and have the 4.6.
It sounds great...BUT, I have the dreaded cab drone when driving and holding about 40-45 mph. (muffler sound resonance inside the cab)

 

what series muffler did you use.

 

40 Series

 

I got orginal 40 si/do, it is vicious sounding and drones all the time.

 

I had a 18" Magnaflow installed on my 2 day old 06 Scab yesterday and it sounds great. Quiet at idle and absolutely no drone while cruising but throaty when you give it gas. Man that stock muffler is a beast!

 

I did the same thing. No drone at all. It sounds a little too quiet at first, but gets a little louder once it breaks in.

 

I have a single chamber flowmaster (racing muffler), it's incredibly small but packs a pretty mean rumble, as mean as the 5.4L will get. I get a little drone but it's not too bad or annoying.

 

i love the sound it gives on my 5.4. Little drone but only at certain rpm. It sounds way better than my friends magnaflow

 

I had my stock muffler cut off and a Flowmaster 50 series welded in place. The 50 series flowmaster was exactly what I wanted. Not quite as loud as the 40 series, which was just right for me.

 

I've got the Super 40 SI/DO. But, I couldn't tell you if it drones or not since the Mud Grapplers are way louder.

Right now, Im trying to figure out if it'd be louder to do true duals from the Y-Pipe back with two SI/SO Flowmaster Super 40s?

 

That's the setup I have thumper, expect with original 40's. It's the first exhaust system I've had on a truck so there's nothing I can compare it to. I just know that alot of people have commented on it saying it sounded good. It's very quiet at idle, but when your on it everyone looks to see who is coming. It was expensive to do the true duals, but I think well worth it.

jrbhc8

 

Can anyone tell me that knows from first hand experience which is louder? My friend with a Tundra has that set-up and its A LOT louder than my SI/DO. .

 

I got the 40 series SIDO one. It is too loud for my taste although it seems to have gotten a bit quieter after having it for 1 month. Does the sound change with time or am I just getting used to it?

 

The delta flow 50 series sounds great and does not make that famous drone. It just sounds good all around.