Are your exhaust grommets melting?? Blue “Snapper” Grommets-High Temp Silicone-these hold up better and are have the best heat resistance that we have found!!! Designed to fit around a strap with a 5/8″ through hole, and use a 3/8″ through bolt. 1 1/8″ od, 7/8″ thick. Works great for isolating exhaust vibration from mounting bolts when attached exhaust system to hangers and frame.