[Habbi98]

I have an 07 F-150 5.4L with a set of S.Steel OBX Racing Headers & Hi-Flow cats with an Xlerator Muffler on it. The Exhaust Pipe is 3" and with the Headers I am getting an awful sounding Hi Pitch Drone from the exhaust in the 1800-2500RPM range. Does anyone have a suggestion for a replacement Muffler that is economically priced. I have checked on MagnaFlow and they are too expensive. I am considering a Thrush Turbo, but have not heard them in the 5.4L before, has anyone heard what they sound like?

[Longshot270]

The best advice I can give you is to try YouTube. I had a flowmaster 40 that I swapped out for my old stock muffler.

[Habbi98]

I've tried the youtube option and could not find any good sound clips of anything with headers. I am contemplating going back to a stock muffler if i cannot find anything as this drone is extremely irritating in that rpm range and i will be pulling an RV almost 500mi.le.s with it. The current muffler sounds great at idle or WOT, it's just the mud range rpm's where it is an issue

[88Racing]

Search for wickednicky.....they've got borlas for 89 ea........a pair of these might help...

Also look at performance peddler.....they've got good deals also....

Oval bodies and longer length mufflers decrease drone.....

[Habbi98]

Thanks for the info. I'll check them out. I have heard Straigh thru's help reduce Drone also, Any thoughts??

[88Racing]

Originally Posted by Habbi98

Thanks for the info. I'll check them out. I have heard Straigh thru's help reduce Drone also, Any thoughts??

Yes they do......

[88Racing]

Wicked Nicky link>>>Wicked Nicky Exhaust. The only site you will ever need for low prices on high performance exhaust systems and more.
Performance Peddler link>>> Magnaflow Performance | Discount Performance Auto Parts | Performance Exhaust Systems | Flowmaster Performance Mufflers

[Habbi98]

I did some research over the weekend and got some very differing opinions on which way to go as far as chambered or straight-thru and then today I spoke with a Tech at Flowmaster and he has me real unsure of what to do after he told me that changing out the muffler may or may not fix my problem and i hate to throw away money. I did install a Holley Performance Red Hot over the weekend and all it really did was quite the exhaust down with no reduction in the Drone. I have also read other things about custom tuning making a difference on the DRONE sound as well. Any thoughts on that, as i am currently awaiting a Custom 87 Tow calibration from Bill and the team.

[Longshot270]

How do you plan on routing the exhaust? If you dump underneath the vehicle you will get drone. If you run it out the side like stock or at a 45˚ you'll have much less drone. I'm sure position of the muffler along the length of the exhaust will make a difference as well but I dont have anything besides guesses at how that might effect it.

[Habbi98]

The exhaust is identical to the Stock setup with the exception to the Xlerator VX 13" muffler, 3" Outlet side pipe and 3.5" tip. I am just at a loss right now with all the differing information that I have gotten and don't know which way to go.