I had the delightful experience of trying to install an fms uppipe a customer brought to me.
1. Gaskets were not even cut right and would not even fit over their own supplied studs.
2. Gaskets were the worst set I have seen supplied with any aftermarket up pipe kit *floppy composite material *
3. Studs supplied with kit were about a quarter inch too long and got in the way of re-installing downpipe.
Sealed up with no leaks BUT I have done countless uppipes and this was by far the worst experience I have had with any up pipe install yet
In simple terms, stay away.
Btw shouldn't this thread be in the product review section?