At DMG Motorsports, we present the Yoshimura Spark Arrestor RS-3 Monkey Insert SA-18-K — the purpose-built replacement insert designed specifically for Yoshimura RS-3 full and slip-on exhaust systems fitted to the Honda Monkey. If you love the aggressive tone of your RS-3 system but need to tame the volume for HOA rules, neighbors, or off-road spark arrestor requirements, this drop-in insert is the factory-engineered solution. It quiets the exhaust note without sacrificing the performance character Yoshimura is known for, and doubles as a USFS-approved spark arrestor so you can legally take your Monkey off-road.
Features:
- Purpose-built spark arrestor insert for Yoshimura RS-3 Honda Monkey exhaust systems (fits both full Race and slip-on Street configurations)
- Reduces exhaust noise by approximately 4 decibels compared to the standard RS-3 muffler
- USFS Approved spark arrestor design, enabling legal off-road riding
- Helps improve backpressure balance, which can enhance performance and torque feel
- Simple, quick installation into the existing RS-3 muffler
- Genuine Yoshimura part number SA-18-K / SKU 960-0001
- Made in the USA to Yoshimura's exacting quality standards
- Sold individually as a direct-fit replacement/upgrade insert
Fitment
| Vehicle | Year(s) |
|---|
| Honda Z125 Monkey | 2019–2024, 2026 |
| Honda Z125A Monkey ABS | 2019 |
