The Yoshimura RS-12 Stainless Slip-On is built for riders who want a precision-developed exhaust system for the latest Honda CRF450 platform. Developed over more than a year and tested in collaboration with HRC Honda Racing, Honda Japan, and MXGP World Champion Tim Gajser, the RS-12 focuses on optimized fit, smart packaging, and controlled sound with a volume insert—ready for moto, track days, and trail use.
Product Details
SKU: 225852S320
Brand: Yoshimura
Category: Signature Series Exhaust System
Key Features
RS-12 asymmetrical muffler design to maximize internal capacity
Integrated resonance chamber designed to manage sound and increase usable power
Unique RS-12 profile provides added clearance for tire and brake caliper
Oval manifold design developed using FEA (Finite Element Analysis) and produced via hydroforming
Precision-machined joints for a superior seal and exacting fit with full 360-degree contact
Works-look matte carbon fiber end cap with detailed Yoshimura styling
Inner-cap mounted end cap cover design to improve durability and ease servicing versus common sandwich-style mounts
Patent-pending Precision Taper Fit (PTF) insert ring for easier install/removal of sound inserts and spark arresters
Tapered muffler inlet design allows the system to be pushed forward to aid weight centralization
Sound level feature: includes a Volume Insert
Proudly designed, developed, and made in the USA
Fitment & Notes
Fitment: Honda CRF450R/RX (2021–2024) and CRF450R-S (2023–2024).
Notes: Repack kits, optional inserts, and spark arresters are available separately. Sound insert/spark arrester options listed by Yoshimura include INS-32-K (Volume Insert: Yes), INS-34-K (Volume Insert: No), and SA-21-K (Spark Arrestor: No).
⚠️ WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
Learn more.
Choosing a selection results in a full page refresh.
