Your Yamaha’s exhaust system is premeditatedly made only for management of dischargers and fuel efficiency. On the other hand, FMF Exhaust System is for engine’s additional capability in providing more horsepower. FMF, being the number 1 aftermarket performance exhaust provider, just provide evidence of their passion in craft. Surely FMF will provide your YZ490 horsepower and torque an incredible increase. With FMF’s complete line of products, it will be very easy to get your bike in style and in great performance. Buy Now! And expect an unexpected enhancement in your YZ490 performance. Be Extraordinary! Let FMF outsmart your bike’s performance.