AVAILABLE NOW FOR PRE ORDER! Shipping early January 2027

The reviews are out, some say "it's the best 450 ever made". While we have to be neutral, there's no doubt our Signature Series RS-12evo slip-on will make even the "best 450" made, even better. The latest evolution of the Honda CRF450R has a host of improvements, a new chassis, airbox and ECU configuration all providing more power with less noise.

For starters, our all-new RS-12evo slip-on checks the looks box. From the new stainless steel hydroformed canister to the new RS-12evo carbon fiber end cap, finishing with our new badging, there's no doubt this slip-on will turn heads.

When it comes to performance and sound the RS-12 Signature Series slip on is 6.3 pounds of pure power. Boosting stock performance even with a USFS spark arrestor installed, we left no stone unturned. sound level at 4750 RPM is a mere 95.5dB while still maintaining that distinctive Yoshimura bark when you crack the throttle.

Some of the features of the new RS-12evo slip-on include:

All-new RS-12evo carbon fiber end cap

It was time to enhance the look of the RS-12. Introducing RS-12evo carbon fiber end cap, the next level, represents an unrelenting pursuit of form and function from our R&D engineers at Yoshimura.

All-new Hydroformed Stainless Muffler

RS-12evo is an all new hydroformed stainless steel muffler design that allows for the most efficient use of the area next to the airbox, subframe and shock creating a custom tailored fit that no others have. The fitment is engineered to nest with the stock side panel perfectly. Efficiency is one thing, but the sick look of the styling on the RS-12evo muffler is second to none.

Precision Taper Fit

Precision Taper Fit sound inserts are a patent pending system that allows for easy removal and installation of sound inserts and spark arrestors with RS-12 and RS-12evo mufflers.

Includes USFS approved spark arestor

The RS-12evo slip-on for the Honda CRF450R is designed, developed and made in the USA