The Big Gun Exhaust Yamaha YZ 450F (23-25) EXO R Series MX Full System is a high-quality exhaust system kit designed for motorcycles. Manufactured by Big Gun Exhaust, the product is part number 19-24553 and specifically made for the Yamaha YZ 450F model years 2023 to 2025. The EXO R Series MX Full System offers an enhanced exhaust and emission system for improved performance on the track or trail.