Just another exaust question for a 4.7L
Registered User
Joined: Mar 2009
Posts: 6
Likes: 0
From: Phoenix, AZ
hammer, when i talked to the exhaust guy that installed it he told me that they have absolutely no back pressure. (could've just been telling me what i wanted to hear.) i'm pretty sure thats false but when compared to a stock muffler we know that aftermarket should flow better thus making my mileage go up. theoretically... that is. but my real question ..if it flows too much how can i tell? and where could i educate myself on the lack of flow of the "flowmaster" ha
Veteran
Joined: Sep 2006
Posts: 317
Likes: 0
From: Polk County
I dont have a muffler anymore... it fell off. I love the sound that it puts out now so i dont see why i would want to spend any money to put a muffler on it. Why dont you just crawl under her and take a hacksaw to the exhaust? 
Champion
Joined: May 2008
Posts: 4,210
Likes: 0
From: Shreveport, LA
I replaced my Flowmaster 40 series with a 50HD series...then got tired of it being so quiet...I have straits after the y-pipe with no muffler (duals of course) but it sounds awesome...a drone at highway speeds but it really sounds good
Veteran
Joined: Nov 2007
Posts: 328
Likes: 0
I've got a true dual 2.25" system with a Flowtech X pipe and Thrush 2 chamber mufflers exiting thru 3" tips. It sounds wicked. Here's a clip:
Download DW_A0008.mp3 from FileFactory.com
You gotta go thru some BS to get it, click on "Download for free with FileFactory Basic" on the first page, then "CLICK HERE to download for free with Filefactory Basic" on the next page.
Download DW_A0008.mp3 from FileFactory.com
You gotta go thru some BS to get it, click on "Download for free with FileFactory Basic" on the first page, then "CLICK HERE to download for free with Filefactory Basic" on the next page.
Last edited by ivaskaj; Mar 12, 2009 at 06:52 PM. Reason: found link
Banned
Joined: Sep 2005
Posts: 7,759
Likes: 1
Flowmaster mufflers are really getting a bad rep for their lack of "flow", and the few dyno's I've seen are kinda confirming this. As stated, I'm looking to ditch my 50HD. I bought into their marketing of "engineered especially for the new Dodge Hemi" when I got my truck in '04. It was the second mod I ever did before the truck was a month old.
Registered User
Joined: Feb 2012
Posts: 1
Likes: 0
From: Longview, TX
Best Sounding Exhaust on Dodge 4.7
I started out with the Flowmaster Super 40 exhaust on my truck, with duals coming out the back. It sounded good for someone who was young and still in high school. It has a very deep pitch to it. I've had straights (very loud with a lot of popping, my favorite, but not legal lol), 12" glasspacks (popped some but not near as much as the straights), 18" glasspacks (just not loud enough for me), and right now I have the SLP Loudmouth (very loud with almost as much popping as the straights). I love the Loudmouth. But I also like it VERY loud.
