FMF Factory 4.1 Muffler CRF450R 2021-2024 041603 1821-2044 Stella Dyno v2 Jacket the entire system is designed

the entire system is designed not to turn blue for the life of the product so with a bit of care it will still look like new years later

TorqDrive® provides more clutch discs in less space

dust and grit

Include a resealable bag for added convenience

Perfect basic numbers or for frequent number changes

FMF Factory 4.1 Muffler CRF450R 2021-2024 041603 1821-2044 Stella Dyno v2 Jacket the entire system is designedThe lightest mufflers available Superior power and performance horsepower improved throughout the rpm range Feature exclusive proprietary Chamber Core technology Factory Forward Engineering centralizes mass, improves handling Made from premium quality American materials Customize with performance tuning inserts and spark arrestor module Meet AMA sound requirements on most models; inserts available for others