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<p>[QUOTE=&quot;Rideandrepair, post: 12378050, member: 168603&quot;]They make a product for slip joints. Looks like black grease. I saw a Mechanic using it once at a Peterbilt Dealership. Some type of paste, that also hardens and fills small gaps. I’ve never used it myself. Sure made the job look easy. A little grease or WD wouldn’t hurt. I had a hard time recently, changing the elbow off the turbo. It was stuck inside the flex. PB Blaster and an hour of pounding with a hammer finally got it out. I use the good SS full wrap clamps with a flare in them. They last almost forever. I usually buy a couple new ones for the outside elbows when replacing, and re use the best of the old ones underneath. I keep any of the old ones that are still in decent shape. They’re expensive but worth it. The cheap flat stretch type with aluminum foil packing always leak and break if over torqued. I cut the stacks off 4-5” at the bottom last time I replaced mufflers. Swapped them so the dents and faded chrome is on the inside. Anything to save a Buck, Lol. With the new shiny saddle clamps, good full wrap band clamps and elbows, my 20+ yr old stacks still look good. Whatever that black stuff is called, maybe exhaust paste? I’ve seen it before while taking the original exhaust apart. It crumbles&nbsp; apart, looks like carbon, but it’s the paste. I’ve seen it for sale, just never used it. Good for sealing the slip joints. Avoiding the small leaks. My FLD only has one short piece of flex. I upgraded the pipe off the turbo, from a short 1/4 turn, to a full S style. Now the flex no longer breaks every couple years. The straighter, with less stress points near the ends, the better. You want it to flex in the middle of the run as much as possible. Mine used to break at the turbo flange end. I’d have to buy 3’ of it every 2-3 yrs.&nbsp; Now it’s shorter and lined up straight, and has lasted over 5 yrs. so far.[/QUOTE]</p><p><br /></p>

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