The Triumph Arrow 2:1 Exhaust System (A9600467) is for off-road use only. The Arrow 2 into 1 Exhaust System offers up to 62% weight savings. The system requires a specific engine tune download. This item fits Bonneville, Bonneville SE, Bonneville T100, and Thruxton models. Instructions for installation are available at www.triumphinstructions.com.