Decha Performance 2022+ Honda Monkey Stealth Intake Tube

Bit of engineering experience here. Overall, the tube is pretty cool. If you don't have a 42 mm step drill, you can hand die grind The old hole out by hand. Slowly. I found a socket that had the 1.654 OD I needed and traced with a silver Sharpie. The first step from the end of the flared bell on the end of the tube is what you want. Inside the tube on the throttle body side/carb has some slight flash from manufacturing. Again, use a die grinder or dremel to remove. Slowly. Remove the spark arrestor on the air cleaner box. It's the metal mesh appearing rectangle. If you grind down the plastic nubs that secure it, it will come off easily. After that, just check your final tube angle with the box installed. A little bit of windex where the tube meets the air cleaner box will allow easier twisting. If you nerf up the phillips screw on the hose clamp, don't worry. It's M4 .70 1.25" long? Roughly. Most hardware stores will have them.

This thing is great! Definitely helped make all my mods work better together and the responsiveness from my monkey now is great! Definitely worth the buy! Got it quick and it's just plug and play!

10/10 would recommend to anyone with a Honda Grom. I purchased the stealth intake and flash tuned ECU from DHM for my wife’s 2025 Honda Grom and couldn’t be happier with the performance upgrade we got out of it. We waited till we put about 2200 miles on a stock everything before doing the upgrades. Bone stock with no power upgrades or body modifications, originally we could get it to hit 71 mph max going down hill and 56 on a flat straight road, after doing the power upgrades as well as some body mods like a 12 bar that added to its weight, the Grom now has the ability to do 83 MPH downhill and 74 MPH on a flat straight. 100% satisfaction from this customer and can guarantee I will be buying from here again.

Great product. 125 has some much more zip!

This is what I was looking for...no ecu flash and just bypassed the cat on the exhaust ...ran ok ....then when I I installed this it was nite and day 70mph flat out. Very very good quality and very good shipping