- -6%
FMF Factory 4.1 RCT Screen Insert for 4-Stroke Exhaust
- -6%
Replacement 4-Stroke Exhaust Spark Arrestor Screen Insert. NOTE: Will not pass 2025 FIM sound regulation.

FMF - Flying Machine Factory - 1973 was founded by a twenty-two-year-old named Donny Emler, a typical Southern Californian who, like everyone else in the 1970s, found a passion for riding and racing dirt bikes. FMF is now one of the most recognizable logos in motocross. The main area of FMF is the highest quality exhaust systems for dirt bikes.
FMF Factory 4.1 RCT Screen Insert for 4-Stroke Exhaust
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