Yoshimura RS-4S Full LineYAMAHA 450 WR 450 F (DJ03) - 2012 - 2015Ref : 757061 / 1088496001

Yoshimura exhaust systems are developed in collaboration with leading US teams
They trust them:Team Geiko, Team Rockstar Suzuki (Justin Barcia, Trey Canard, Eli Tomac, James Stewart)
The RS-4 is a complete aluminum/stainless-steel exhaust system with pentagonal silencer and carbon tip.
Poly-resonant duplex chamber" design ", making it quieter while increasing power over the entire operating range.
Supplied with a db killer to meet FIM 2013 noise standards and a second db killer with spark arrestor grille.