This set of two muffler pipe joining couplers is designed to provide a secure and leak-free connection between the exhaust header and the muffler on .12 and .18 size glow fuel engines. Manufactured from durable, heat-resistant silicone, these couplers effectively absorb vibrations and allow for slight flex in the exhaust system, preventing stress cracks and ensuring optimal exhaust flow. They are essential for maintaining engine performance and sound dampening on nitro-powered RC cars and trucks, making them ideal for enthusiasts seeking reliable replacement or upgrade parts for their Kyosho or compatible vehicles.