Just swapped my side pipes to new ones with Flowmaster slimline mufflers welded in.
My setup is Coyote headers, ffr J-pipes, side pipes with mufflers.
The mufflers are quite heavy. I would guesstimate twice as heavy as the original pipes. I had some issues installing them because when I used the hanger method for the regular pipes the weight of the pipe overwhelmed the rubber piece on the hanger and immediately pulled it to full extension. This caused the rear of the pipe to sag about 1.5" which was to low. In an effort to overcome that I used a more rigid mounting system where I made a metal shim to sandwich behind the rubber piece. I just attached one bolt at the bracket on the pipe itself and did not tighten it down all the way so the pipe could rotate some that way. Thinking this would allow for some play
This resulted in the pipe staying right where I wanted it and just a small amount of play if I pulled on the aft end. I thought I was good to go with that setup. Didn't make it 50 miles and both J-pipes broke at the welds.
Obviously my current set up will not work. Now I need to find a long term solution.
I lucked out when I had the issue and pulled into a random body shop on the road and they were able to take the pipes off and weld them right on the spot good enough to get me home. Through a generous friend on the forum I have a new and unused set of J-pipes on the way to me.
I am looking for suggestions on how to find a permanent fix so this does not happen again.
Has anyone else had this happen and what did you do?
My thought is to weld another tab on the pipe further back and support the rear end with another hanger. While doing this I will take the metal shim out of the forward hanger and let the rubber pieces work as designed. I think two of them should hold the pipe in position. Not sure if that will help up front though.
Another forum friend mentioned the J-pipes could be rewelded along the seams for a stronger piece and also had the idea of having a hanger going from the 4 bolt flange where the side pipe attaches and anchoring it to one of the bolts the header attaches to the engine at. Thus allowing the pipe to move with the motor but also providing support for that joint. That seems like a good idea as well.
Im lacking in knowledge in the forces being applied and the best way to support the pipe and also give it the freedom of movement it needs to prevent the welds from breaking.
Any suggestions or input is appreciated.