Remflex are general purpose gaskets. ESPECIALLY if you use other cheap exhaust parts, these gaskets are a must. A flat metal gasket has just enough compression to create a seal, an MLS gasket is smaller, but this gasket compresses and fills any gaps; So if you buy a cheap exhaust with deformed flanges, don't give the product 1 star because you were a cheapskate, buy a decent gasket and don't worry.