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Carmel, IN
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Introducing Podium Points! Get rewarded for every dollar you spend. Click the Rewards button at the bottom of the page!
The RS-9T race system for the third-generation Grom (2022 on). Yoshimura measured 13.9% more peak horsepower and 14.3% more peak torque, and designed it to give more ground clearance and lean angle than the system for the previous Grom. It has a matte carbon fiber end cap and heat shield, and the muffler takes five sound inserts (SA-15-K, SA-14-K and INS-RS9A/B/C-K) to tune sound and delivery. Made in the USA. It does not fit the 2025 Grom SP's lower cowling.
Fits Honda Grom 2022–2026
We sell this part for closed-course competition use only, and do not ship it to California. Yoshimura makes it as a Race Series part: for closed course competition only, not intended for street use.
| Bike | Years | Notes |
|---|---|---|
| Honda Grom | 2022–2026 | — |
Check the fitment list for your exact bike and year, and order every part it says this one needs.
| Line | RS-9T |
|---|---|
| Yoshimura series | Race |
| Type | Full |
| Header | Stainless |
| Muffler sleeve | Stainless |
| End cap | Carbon Fiber |
| Finish | Yoshimura Works Finish |
| Yoshimura's dyno | +13.9% peak horsepower, +14.3% peak torque |
| Sound inserts | SA-15-K, SA-14-K, INS-RS9A-K, INS-RS9B-K, INS-RS9C-K (sold separately) |
| Fitment note | Not compatible with the 2025 Grom SP lower cowling (interferes with the cowling and its bracket) |
| Made in | USA |
| Sound inserts / spark arresters (sold separately) | SA-15-K |
| Yoshimura part number | 12122AR520 |
| Use | Closed-course competition only; not shipped to California |
Ships to the lower 48 and DC. Returns accepted on most items.
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