So I installed a Mufflex 24" on my Factory dual Hemi yesterday. Every time I drive my truck, the forward part of the muffler slides about 1/2 inch back on the pipe. This has happened three times. I have tightened the clamp to the point that I fear it will snap and it is still slipping. Has anyone else had this issue? I am guessing I will just have it welded on.

 

Are the sizes of the pipe compatable? I.E. if one pipe is 2" outside diameter, the muffler attaching itself to that should be 2" Inside diameter, which is a snug fit as it is, and the clamp should be more than enough to hold it. If you have a gap, 2" and 2 1/8" or 2 1/4" or whatnot, then the clamp might not seal that.

Also, do you have a standard exhaust clamp? if so, you probably wont tighten it to the point of breaking. Thats pretty tough to do.

 

Ain't never clamped an exhaust in my life, I've always welded mine on. I'm not saying clamping don't work, but I sure the hell wouldn't do it. Weld the thing on there and it won't move again...

 

Clamps fail. Plain and simple. Factory and aftermarket alike.

Weld it and be done.

 

Weld it...!

 

Mufflex are crap. Way overpriced and those clamps are nothing but a pain in the butt. I struggled with my Mufflex 14 for about 3 months. It'd constantly come loose and start rattling it was vibrating it's self off. I got busy for a couple of weeks there and couldn't keep it tightened. Even though I'd cut additional slits in the pipe to help with the compression of the clamp, it still managed to work it's way off. The passenger side exit pipe worked it's way out and dropped while I was driving. The hangers kept it from hitting the ground though thankfully or it would have made a hellva mess. I tighten it back up and two days later had the entire muffler replaced with a Flowmaster 40. The Mufflex went in the muffler shop's recycle bin, and good riddance.

There are plenty of folks on here that have had similar issues. Mufflex are crap, but since you've already spent the cash on one, save yourself some headache and get it welded on ASAP.

 

clamps never work, i lost a magnaflow muffler from clamps. no matter what, they always failed for me. So I eventually just gave in and had the local meineke weld it on

 

Did mine in the driveway with my little 110v Lincoln wire feed. Not the prettiest "text book" welds but it ain't going nowhere. Can't beat having a little 110v welder around. I learned on a "stick" welder as a teen working for an awning and canopy shop, but MIGs are so easy it's like cheating.

 

Pretty much what I figured. Welding Monday morning!

 

Welding your muffler is a sure way to keep it from moving,but if you decide to change it,it will be a trip to the muffler shop to remove,unless you want lay under your truck with a recipricating saw/saw zaw cutting it loose.When you do this,your header y-pipe will then be 2"-3" shorter,varying on the length of the inlet on muffler,and when another muffler is installed,an extension pipe will have to be made to make up for the section that was cut off.I have allways used preformed,stainless steel band clamps..These clamps are made to fit the difference in OD. of the two pipes,creating a sure seal,and will not move!!!I have used these type clamps on every exhaust sytem I have installed,with no problems.Check them out on Jegs.com,or Summit.com.....Hope this helps......