The product is a Big Gun Exhaust EXO R MX Full System specifically designed for the Honda CRF 450R model years 2021 to 2025. Manufactured by Big Gun Exhaust and with a Manufacturer Part Number of 19-14573, this exhaust system kit is tailored for enhancing the performance of the specified motorcycle model. The EXO R MX Full System is a high-quality aftermarket part that is designed to improve exhaust flow and overall engine efficiency, offering riders a possible upgrade to their motorcycle's exhaust system for optimized performance.