Yoshimura RS-12 Full Exhaust System | SS/AL/CF | Kawasaki KX450F & KX450X

The Yoshimura RS-12 is the next evolution in dirt bike exhaust engineering — over three years in development alongside factory-sponsored athletes and devoted engineers. The result is a system that looks unlike anything else on the market and backs it up with real performance gains, weight reduction, and race-proven durability.

Key Features

• Asymmetrical RS-12 Profile — Maximizes muffler volume to manage sound, add power, and provide extra clearance for tire and brake caliper
• Matte Carbon Fiber End Cap — Works-look finish with decal inlays and industry-leading detailing; inner cap mounted design improves durability and simplifies servicing
• Patent-Pending Precision Taper Fit (PTF) Insert Ring — Makes installing and removing sound inserts and spark arrestors fast and tool-friendly
• Tapered Muffler Body Inlet — Pushes the system forward for improved weight centralization without sacrificing performance
• Precision Machined Joints — Race-grade construction throughout
• Weight Savings — Full system weight 8.5 lbs vs. stock 8.7 lbs
• 24+ Months of Factory Racing Development — Tested at the highest level of competition
• Made in the U.S.A. — Designed, developed, and manufactured domestically by Yoshimura

Specifications

• SKU: 244720S320
• Construction: Stainless Steel header / Aluminum canister / Carbon Fiber end cap (SS/AL/CF)
• System Weight: 8.5 lbs (vs. stock 8.7 lbs)
• Shipping Weight: 14.75 lbs
• Insert Ring: Patent-pending Precision Taper Fit (PTF)
• Accessories: Repack kits, optional inserts, and spark arrestors available separately
• Origin: Made in the U.S.A.
• Vendor: Yoshimura

Fitment

• 2019–2023 Kawasaki KX450F
• 2021–2023 Kawasaki KX450X

Always verify fitment with your model year before purchase. Repack kits, sound inserts, and spark arrestors are sold separately.