Installed a FlowMaster 40!
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Senior User
Joined: Dec 2009
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Installed a FlowMaster 40!
The stock muffler on my truck (1999 F250 with 6.8) was getting pretty rusty and although not leaking I figured it gave me a good excuse to change it... I replaced it with a Flowmaster 40 series and an 18 inch stick of 3" pipe. I didn't use all of the pipe I just cut it to fit and everything worked great. I also added a 12 inch tip that worked great, I cut the old pipe just before the bend and heat shield then welded this in its place.
The sound is a little louder but not near as loud as I thought it was going to be, it basically just gave it a little louder more mellow sound.
Topped off the tank of fuel right after install and manually calculated 12.6mpg (10.9 on overhead but reset it anyway), hopefully this will yeild a little gain..
99 Super Duty 6.8 V10 with Gibson headers and FlowMaster 40 - YouTube
The sound is a little louder but not near as loud as I thought it was going to be, it basically just gave it a little louder more mellow sound.
Topped off the tank of fuel right after install and manually calculated 12.6mpg (10.9 on overhead but reset it anyway), hopefully this will yeild a little gain..
99 Super Duty 6.8 V10 with Gibson headers and FlowMaster 40 - YouTube
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The most I haul is about 3000-4000 may haul more on occasion but very seldom, With no load it has very little drone in the cab but its not as load as I had expected so it may have something to do with the factory cat... I will comment back after some good use..
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So far I can't tell much as far as mileage still around 13mpg. But drone is almost none existant, it has just a little but nothing like I thought it would be and the truck is still not as loud as I thought it would be either, it maybe the cat making it quite..
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Postmaster
Joined: Oct 2008
Posts: 3,924
Likes: 6
From: Richmond BC
cant say i like or dislike it..
i certainly wouldnt put that on unless i needed a muffler.
of all the exhaust notes on a V10 i've ever heard only the cherry bomb exztremes make the V10 sound better..
but theres no doubt the cherry bombs will give drone. but at least it makes the exhaust note itself better.
i certainly wouldnt put that on unless i needed a muffler.
of all the exhaust notes on a V10 i've ever heard only the cherry bomb exztremes make the V10 sound better..
but theres no doubt the cherry bombs will give drone. but at least it makes the exhaust note itself better.
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Senior User
Joined: Mar 2012
Posts: 126
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cant say i like or dislike it..
i certainly wouldnt put that on unless i needed a muffler.
of all the exhaust notes on a V10 i've ever heard only the cherry bomb exztremes make the V10 sound better..
but theres no doubt the cherry bombs will give drone. but at least it makes the exhaust note itself better.
i certainly wouldnt put that on unless i needed a muffler.
of all the exhaust notes on a V10 i've ever heard only the cherry bomb exztremes make the V10 sound better..
but theres no doubt the cherry bombs will give drone. but at least it makes the exhaust note itself better.
Senior User
Joined: Oct 2008
Posts: 367
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From: Plover, WI
I really need to get a clip of my truck with the Dynomax VT for you guys, very nice tone. Anyone around Central WI wanna meet up for a beer n video my truck for me? All I have is my cell for taking vids.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
They are tiny single chamber race muffler like the Flowmaster 10 series. Would be highly annoying to me on a V10.
Postmaster
Joined: Oct 2008
Posts: 3,924
Likes: 6
From: Richmond BC
heres a quick clip i found,
cherrybomb extreme on F250 V10 - YouTube
there was a better video on this site posted before. cant seem to find it now thou.
cherrybomb extreme on F250 V10 - YouTube
there was a better video on this site posted before. cant seem to find it now thou.
Junior User
Joined: Aug 2011
Posts: 67
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From: Dickinson, ND
I had a flowmaster original 40 series installed last week, 3" in to dual 2.5" out. I really like it, coming from straight pipes it is super quiet. You can't even hardly hear it on the highway over the drone of my tires. Very pleased.
