Unfortunately, this seal is fragile. The instructions say not to use caulking glue. When the gasket slipped off the manifold and fell 2 feet to my garage floor, it buckled and broke. I then went to the auto parts store next door and bought a Felpro combination intake/exhaust gasket. Uses glue to secure it in place. It did not shrink under pressure like Remiflex. The Felpro seal worked like clockwork. Remiflex is too fragile to be practical and costs twice as much as Felpro. Disappointed but lesson learned