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Exhausts Ask first ten riders aftermarket purchases they made for their motorcycles and the possibility of nine of them will give the same answer: a drainage system. It's hard to resist whining howl of the engine full song, and let the engine breath easier not only release more than a beautiful exhaust note, but it also can liberate a certain power in the process. The problem was always that the change in air / fuel ratio caused by a new exhaust, the reconfiguration of the fuel injection (or re-jetting the carburetor to those who have an old bike) to achieve the right mix is usually required. FMF does not think that should happen. Its line of Apex slip-on exhaust is completely designed and manufactured in Southern California headquarters to operate without recalibrating the motorcycle stock fuel system. Although relatively new on the market side, FMF has been heavily involved in off-road competition in both two-and four-stroke engines for over 30 years. Companies that ...