2009 KTM 450 SX ATV Review Picture 3 of 17

Photo 3 of 17

The stock aluminum muffler with spark arrestor was swapped out for an aftermarket slip-on unit. Following the KTM race team’s lead, a FMF Factory 4.1 can was bolted in place and the boost in reactive power was noticeable.

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2009 KTM 450 SX ATV Review Picture 3 of 17

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Motorcycle USA covers the world of motorcycles with breaking motorcycle news, motorcycle reviews and motorcycle race coverage. When you can’t afford to miss a single event in the world of motorcycling, trust Motorcycle USA to bring you the inside scoop on the two-wheeled world.