GROM 2022-26 RS-9T Slip-On: Fitment and Install Guide
By Yoshimura R&D of America, Inc. | Published: 2026-11-04
Category: Guías prácticas
Fit a Yoshimura RS-9T stainless slip-on to your 2022-26 Honda Grom with a clear step-by-step process and checkpoints for a clean, secure install.
Quick answer
The Yoshimura RS-9T stainless slip-on is designed for the 2022-26 Honda Grom and installs with basic hand tools. Work methodically: remove the stock muffler, test-fit the RS-9T, secure the included hardware, and verify clearance before your first ride.
Why the RS-9T is a slip-on, not a full system
A slip-on replaces the muffler and leaves the stock header in place, so you get a lighter, better-sounding exhaust without removing the header. That makes it a good first upgrade for a Grom, but it also means the stock header gasket and joint must be in good condition. If the stock header is damaged or you plan engine work, a full system may be the better path.
What the pre-production note means for your order
The catalog listing notes that the system shown is pre-production and that production systems will come with a matte carbon fiber end cap and heat shield. Check the hardware and finish in your box against the included parts list before you start, and confirm the end cap and heat shield are present. If anything is missing, contact the seller before installing.
Tools and prep that save time
Set the bike on a rear stand or level surface and let the exhaust cool completely. Have a socket set, hex keys, a torque wrench, and penetrating oil ready; a rubber mallet helps free a stuck stock muffler. Loosen the stock clamp bolts before you try to slide the muffler off, and avoid prying against the swingarm or bodywork.
Step-by-step RS-9T slip-on install
- 1. Secure the bike and cool the exhaust: Place the Grom on a rear stand or level ground and let the exhaust cool fully. Remove the seat or side panels only if your model requires it for access. Never work on a hot exhaust; burns and warped hardware are common shortcuts.
- 2. Loosen and remove the stock muffler: Apply penetrating oil to the clamp and joint, loosen the clamp bolt, and slide the stock muffler off the header. Keep the stock clamp and gasket if the RS-9T instructions reuse them. If the muffler won't budge, twist gently rather than prying against the swingarm.
- 3. Test-fit the RS-9T before tightening: Slide the RS-9T onto the header and align the mounting bracket with the frame. Check clearance to the swingarm, chain guard, and bodywork before you tighten anything. A test fit reveals misalignment early; don't force a bracket that doesn't line up.
- 4. Apply the heat shield and end cap: Fit the matte carbon fiber heat shield and end cap according to the included parts. Snug the fasteners by hand first, then torque to the specification in the instructions. Over-tightening carbon fiber can crack it; use the supplied hardware and torque values.
- 5. Torque the clamp and bracket: Tighten the header clamp and mounting bracket to the torque values in the RS-9T instructions. Recheck clearance after tightening, since the muffler can shift slightly. Recheck all fasteners after the first heat cycle; expansion can loosen a clamp.
- 6. Start and check for leaks: Start the engine and let it idle briefly. Listen for exhaust leaks at the header joint and check that the muffler isn't contacting bodywork or the swingarm. A ticking sound at the joint often means the clamp needs a final snug; address it before riding.
Product facts
- GROM 2022-26 RS-9T Stainless Slip-On Exhaust, w/ Stainless Muffler: Fits 2022-26 Honda Grom and includes a stainless muffler. Confirm your model year before ordering; the stainless body is durable but still benefits from a proper cool-down before removal.
GROM 2022-26 RS-9T Stainless Slip-On Exhaust, w/ Stainless Muffler - GROM 2022-26 RS-9T Stainless Slip-On Exhaust, w/ Stainless Muffler: Production systems come with a matte carbon fiber end cap and heat shield. Check both parts in the box and fit the heat shield before final tightening so you don't have to redo the install.
