S&S CYCLE Power Tune® XTO Muffler Insert - 1-3/4 inch Rear Plugged with 3.5 mm Holes, Part 550-1669 Fork Dampers & Parts Strategically placed airflow channels for

Strategically placed airflow channels for increased ventilation

218 certified and SNELL 2025 approved (3X/4X DOT only)

replacing sliding mechanisms to reduce friction and resistance

Expanding Knuckle Gussets: Offer additional protection and flexibility

S&S CYCLE Power Tune® XTO Muffler Insert - 1-3/4 inch Rear Plugged with 3.5 mm Holes, Part 550-1669 Fork Dampers & Parts Strategically placed airflow channels forPower Tune XTO Muffler Insert 1 3 4" Rear Plugged 3. 5 mm Holes Upgrade your motorcycle's exhaust system with the S&S CYCLE Power Tune XTO Muffler Insert, designed for 1 3 4 inch exhaust pipes. Crafted from durable 304 stainless steel, this muffler insert enables precise control over your bikes sound and performance. It allows you to easily adjust the power, torque, tone, and overall sound profile to match your riding style and preferences, providing