[era2107]

I have ERA 2107 with pipes & primaries provided from them. In my case the tabs were welded on both primaries and sidepipes by ERA. the bracket you mentioned welds to the side pipe at a floor support under the car. There is also a small piece of rubber ( looks like tire side wall material) that bolts to the floor support and to the bracket. The slip fit of the primaries and side pipes should be lined up prior to welding to allow for the nuts & bolts that holds them together to line up upon installation. If you did not get the exhaust from ERA its a totally unique fabrication that depends on which motor and headers etc.