my muflex 14" fell off today!!
Professional
Joined: May 2009
Posts: 197
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From: Northern Virginia
Had a similar event, the tailpipe fell off, muffler held in place fine. Its the notches that mufflex puts on their pipes, they arent quite tall enuf to allow the stock pipes to slide under them.
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All Star
Joined: May 2009
Posts: 846
Likes: 0
From: s.e. michigan
94rt.... yeah, i didnt use a air impact.... BUT a 3ft. long cheater bar on a 1/2 ratchet puts out moret torque than an air tool, to the point that i could see it starting to twist or break if i kept going......
Veteran
Joined: Jan 2010
Posts: 254
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From: Alberta, Canada
I just had my Magnaflow put on a couple of weeks ago and I started to hear a rattling coming from under the truck. When I looked under I found one of the clamps that holds the pipe on was not even tightened up. I am surprised the pipe didn't come off. So I got my ratchet and tightened it up. Just previous to me finding that both my tailpipes slipped off their hangers. Sound like I got ripped off on the install. I am going to go back to the place and have them check everything to make sure I am not going to lose my muffler one of these days.
All Star
Joined: Jun 2009
Posts: 975
Likes: 0
From: San Antonio, TX
I had a lot of the problems described here. The Mufflex was getting loose every couple of weeks and rattling (mainly on start up). I tightened it as much as I could, almost to the point of thinking the bolt was going to snap, but every time it'd work it's way loose. Because it was loose, I was also getting exhaust leaks. The inlet pipe was black with exhaust so much was escaping.
On Friday I just got fed up with it all and had the muffler replaced and welded. I swapped out the Mufflex 14 for a Flowmaster Super 40.
On Friday I just got fed up with it all and had the muffler replaced and welded. I swapped out the Mufflex 14 for a Flowmaster Super 40.
Veteran
Joined: Mar 2009
Posts: 498
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From: back woods of Chester County PA
If you want to fix it yourself in 10 minutes with no air tools or welds, just pull the mufflex off, cut another slit on the opposite side of the one it came with. About 2x the width of a jigsaw blade will do it. Put it back on and you are good to go. Mine kept leaking at the inlet, the two outlet ones were fine and if I tightened the inlet clamp more, I would have busted the clamp bolt. This thing pinched up real nice now, no leaks ( no black carbon stains around the clamp anymore for 5k miles now ) and I did not nearly have to hand crank it on as tight.
Champion
Joined: Dec 2007
Posts: 3,563
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From: Ontario, Canada
The only issue with having the joints welded after install is typically people will need to go to a shop for that. If that is the case the theory behind the Mufflex is out the window, that being a do it yourself system. Now the cost of the setup is not justified as those same people could have put a Magnaflow 14 in for a little less.
I went with it because if I can avoid someone else doing work on MY stuff it is a good thing. I have had ZERO issues with it after 14K on the muffler and not once having to re-tighten it.
One thing (and I note this in my how to) you really need an air compressor and air impact to do this. Do not fool your "strong" self. Doing this by hand is not as good as letting an impact hammer away at it. Of course I also mentioned the position of the clamp as being important in my how to.
I went with it because if I can avoid someone else doing work on MY stuff it is a good thing. I have had ZERO issues with it after 14K on the muffler and not once having to re-tighten it.
One thing (and I note this in my how to) you really need an air compressor and air impact to do this. Do not fool your "strong" self. Doing this by hand is not as good as letting an impact hammer away at it. Of course I also mentioned the position of the clamp as being important in my how to.
Professional
Joined: Feb 2010
Posts: 101
Likes: 0
From: Dayton, OH
A lot of it is the clamps you use. The "U" clamps are worthless. Get band clamps, like from Summit (I believe Walker brand). They clamp onto both pipes, not just in one spot squeezing the pipes together.
