As its name suggests, the Brute XL is bigger than its predecessors in every way. It boasts a 3¼" barrel, the same size barrel as vintage P.S. Olt cutdowns. It offers a bigger exhaust, a longer tone board, and contains a step-bore system: a first for us at Rolling Thunder. These features allow more precise control in both sound and tone for experienced callers who can properly introduce clean air into the call.