FMF offers you the Factory 4.1 Mini high-performance exhaust system, specially designed for Yamaha motocross bikes. This system delivers significantly more power than original exhausts, optimizing engine response and performance at high revs. Available with titanium or stainless steel manifolds, it combines lightness, durability and heat resistance to meet the demands of the most committed riders. Thanks to exclusive Factory Forward Engineering technology, the exhaust mass is centralized, improving the vehicle's handling and strength in extreme conditions. The innovative tip facilitates installation of the spark arrestor or dB killer by simply removing 4 screws, offering fast, efficient modularity. Compliant with AMA and FIM noise standards, the system features a 94 dB reducer insert and a spark arrestor included with the silencer, guaranteeing safety and compliance in competition. A strategic choice for motocross enthusiasts looking for performance and reliability.

Fits on

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