Yoshimura RS-12 Signature Stainless Full Exhaust with Aluminum Muffler | Suzuki RM-Z450 2019-2022

The Yoshimura RS-12 Signature Stainless Full Exhaust System is a complete header-back motocross exhaust for the 2019-2022 Suzuki RM-Z450, featuring the asymmetrical RS-12 muffler profile with an aluminum body, precision-machined joints, a works-look matte carbon fiber end cap with decal inlays, a tapered muffler body inlet, and the patent-pending Precision Taper Fit (PTF) insert ring.

The RS-12 took over three years of development with Yoshimura's factory-sponsored athletes, technicians and engineers, and it looks unlike anything else in the class. The asymmetrical canister shape maximizes muffler volume — which is what manages sound and makes power — while providing extra clearance for the rear tire and brake caliper, the two contact points that destroy motocross mufflers.

The detail work is where it separates itself: precision-machined joints instead of crimped slip fits, a carbon fiber end cap mounted so it genuinely eases servicing compared with the sandwich-mount designs common elsewhere, and the PTF insert ring that makes sound inserts and spark arresters quick to change between a moto track and public land.

• Complete header-back full exhaust system for motocross use
• Asymmetrical RS-12 profile with aluminum muffler body for tire and caliper clearance
• Precision machined joints throughout the system
• Works-look matte carbon fiber end cap with decal inlays
• End cap design eases servicing versus sandwich-mount designs
• Patent-pending Precision Taper Fit (PTF) insert ring for sound inserts and spark arresters
• Tapered muffler body inlet design
• Yoshimura part number 961-5411 (manufacturer part 219220S320)
• Designed, developed and made in the USA

Fits the 2019-2022 Suzuki RM-Z450 as a direct replacement for the complete stock exhaust, and is the standard full-system upgrade for RM-Z450 motocross and off-road race builds. Some dealer listings show coverage extending across 2018-2023 — contact us with your exact year if your bike falls outside 2019-2022 and we will confirm before you order.