SKU: YOSHI-234850S720
MPN: 234850S720
Yoshimura RS-12 Titanium Full Exhaust for Yamaha YZ450F 2026+

Yoshimura's 234850S720 RS-12 Titanium Full Exhaust, with Aluminum Muffler is made specifically for Yamaha YZ450F (2026-current).

Everyone knows it's hard to beat the performance of a stock Yamaha exhaust. Rarely is such an effort achieved, but in true Yoshimura form, we outdid ourselves.

The best of both worlds. Our first foray into the concept of the hybrid MX system has been with the Honda CRF450RWE, where the durability of the stainless steel header and a light weight titanium muffler reaps rewards without sacrifice. The benefits of the hybrid system revolves around using a stainless steel header where durability is an issue, but focusing on a lighter version of the muffler where we can save big on weight. This concept finds a sweet spot at the intersection of durability. weight, and budget.

Throughout the entire power spectrum our engineers outperformed the stock unit at every RPM. Even torque across the spectrum is improved. Up 9.3% hp gains at 6,200 rpm and up to 9.6% torque is achieved at 6,200 rpm. Even all the way up to the top our hybrid RS-12 system has substantial performance.

Our new RS-12 hybrid system comes in with less weight than stock thanks to our power producing titanium/aluminum RS-12 muffler.

Our new Yamaha YZ450F system boasts a volume specific header resonator that not only looks like a work of art, it helps put the power where its needed.

Inside the front cap of the power producing RS-12 is another resonator that enhances the power characteristics of the new YZ.

If you're a professional racer you know how important passing the FIM and AMA sound regulations can be. Our new RS-12 system is built with that in mind and can pass the 109db sound standard with an optional INS-39-K.

The new RS-12 is easy to install due to the where the header uses its machined joint. In fact its been said that the new system goes on much easier than the stock one comes off. We agree!

Proudly engineered, developed, and built in Chino, California-Yoshimura quality you can count on.

Signature Series: 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.