Over the Winter months I don’t use my M3W but I do run it up to temperature about once a month in the garage. I did this the other day and noticed a rattle from the RH exhaust area, this gradually decreased as it warmed up but was still there slightly when hot. It’s from the flexi joint near the cat, I confirmed it from cold, see the video. This is the original exhaust header that has done over 50,000 miles and has a hard time dealing with the wobbly engine and exhaust. I was always amazed that they didn’t break up.
I intend to replace the flexi joints on both sides but found that there are two types that can be hiding under the exterior braid, convoluted or interlocking . Without cutting into it, I imagine we have the interlocking type? Can anyone confirm this before I order some replacements, sometimes called iLok? They are 2” internal diameter and 6” long. Has anyone else had any problems with these flexi joints?
[video]
https://www.tm-img.com/images/2025/12/21/Exhaust-Joint-4.mov[/video]
