Designed specifically for HarleyÆs big trike 3.75ö muffler bodies are capped off with machined 3ö radial slash-cut aluminum tips that step up to the bodies via a mild, yet graceful bevel This configuration allows the Cobra tips to have the ground clearance equal to or in some cases greater than the stock system Internal construction of the muffler bodies consists of a 2.5ö perforated constant-velocity core wrapped in woven fiberglass that is protected by a fiberglass wrap, providing outstanding performance with a deep thundering bass note Provides outstanding performance with a deep thundering bass note Made in the U.S.A.. MUFFLERS W/BT TRIGLIDE