In 2018, Yamaha made some major refinements to the already potent YZ450F. Adding to the usable and tractable power is how we make the new YZ450F even better.
Now there can be more power to rip holeshots, yet making the bike user friendly at the end of the moto when your right hand gets a little frisky.The new Yoshimura RS-4 Signature Series full system adds 2.8% more h.p. and 1.4 ft-lb. more torque to give the rider better, more linear throttle response.
Proudly made in the USA!
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Resource limitations have made it difficult for Yoshimura R&D to maintain consistent Titanium exhaust system inventory. We are not taking orders for this item at this time. You can always call us at 1-800-634-9166 to get an ETA for your system. Thank you for your patience!
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This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product.
Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.
Signature Series Exhaust System
Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. Our Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of our off-road applications. Every one of our Championship Winning Motocross exhaust systems and nearly all of our ATV/Side-by-Side applications are members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.
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