The MotoSport.com Bill's Pipes 2-Stroke Pipe & Silencer Combo includes ONE Bill's Pipes MX2 Pipe (2-Stroke) in either Nickel or Works finish and ONE Bill's Pipes MX2 Silencer (2-Stroke), each with the following attributes: Bill's Pipes MX2 Pipe - 2-Stroke: Bill's Pipes has long been synonymous with 2-strokes. Years later, even into the 4-stroke era, that hasn't changed. The legendary championship-winning performance and build quality of the MX2 pipe is unrivaled and is designed to give you every bit of horsepower and torque gains imaginable. 19-gauge AKDQ carbon steel construction. Nickel finish: Double nickel plated finish increases product durability and life. Works finish: Unplated finish gives you that "Works" look. Performance gains throughout the entire power band. Hand welded and assembled for a precise fit.