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All of FMF Racing crew consider enjoyment critically when they built the FMF Racing Mini Moto Factory 4.1 Exhaust. This is great with regards to the overall performance and price of this exhaust. Using the Mini Moto Factory 4.1 will make you feel like the king of the backyard motocross and should appear excellent doing any work! This exhaust is proven to have superior power on stock and big bore motors. You can customize it with tuning inserts and spark arrestor. The FMF Racing Dirt Bike Mini Moto Factory 4.1 Exhaust may come with titanium and stainless steel header.