In short
- What it is: the 2G Engineering Hammer Intake enlarged airbox lid for Ducati Monster, Monster+ and Monster SP with the 937 cc Testastretta 11° engine (2021–2024). Air filter not included: use it with the filter you already have.
- What it fixes: jerking and snatchy throttle at low rpm.
- Dyno-tested result: about +4 hp and +6 Nm between 3,000 and 5,500 rpm, with the stock ECU and no remap.
- Plug & Play and reversible: it fits the stock airbox with no cutting or drilling.
Low-rpm snatchiness and torque dip on the Monster 937: where they come from
In traffic, on a constant throttle or out of slow corners, the stock Monster 937 tends to have a snatchy throttle response at low rpm (the on/off effect). The dyno also shows a torque dip between about 4,300 and 5,200 rpm, right in the range you use most on the road.
The main cause isn't the air filter but the way air gets into the airbox: the stock lid has a very small air inlet, designed mainly to meet European noise homologation limits.
Why a performance air filter alone isn't enough
Many Ducati owners start by fitting a performance air filter for the Monster 937. The problem is that the filter sits behind the same stock air inlet: if air can't get into the airbox, a freer-flowing filter changes very little. It's like having a marathon runner's lungs and breathing through a straw.
The solution: 2G Engineering Hammer Intake
The lid replaces the restrictive factory one and enlarges the air inlet. It works with the filter you already have: any filter with the original dimensions will fit, both the stock filter and performance filters. Every lid is designed and made in Soliera (Modena), in the heart of Italy's Motor Valley, from carbon-fiber-reinforced PPA.
What changes on the road
- Smooth low-rpm response: throttle response becomes progressive and predictable, with no jerks.
- More torque and power without a remap: about +4 hp and +6 Nm between 3,000 and 5,500 rpm measured on the dyno with the stock ECU. Peak power changes only slightly. No remap needed.
- Intake sound: deeper and fuller, especially from the mid-range up.
- Keep the filter you already have: it works with the stock filter and with any OEM-size performance filter.
The chart compares a stock Monster 937 with the same bike fitted with the 2G intake system, without a remap: torque is higher from low rpm and the dip between about 4,300 and 5,200 rpm disappears, while peak power changes only slightly.
Which version to choose
| Version | What's included | Who it's for |
|---|---|---|
| Kit with 2G performance air filter | Enlarged airbox lid + 2G dry polyester filter | Riders still running the stock paper filter |
| Enlarged airbox lid only (this page) | Enlarged airbox lid (filter not included) | Riders who already have a filter: stock paper or OEM-size performance filter |
| 2G performance air filter only | 2G dry polyester filter, washable | Riders who want a lifetime filter for the stock airbox |
Compatibility
Ducati Monster, Monster+ and Monster SP with the 937 cc Testastretta 11° engine (2021–2024). Fits the stock airbox with no modifications.
Compatible filters: any filter with the same dimensions as the original, both the stock filter and performance filters.
Riding a Desert X with the 937 engine? Check out the intake kit for the Desert X.
Installation
Installation is Plug & Play: the kit fits the stock airbox, nothing needs cutting or drilling, and you can return to the original setup at any time.
Approximate fitting time: about one hour.
Technical specifications
| Compatible models | Ducati Monster, Monster+, Monster SP (937 cc engine) |
|---|---|
| Years | 2021–2024, all versions with the 937 cc engine |
| Material | Carbon-fiber-reinforced PPA, professional 3D printing, matte finish |
| Air filter | Not included. Compatible with any OEM-size filter |
| Dyno result | About +4 hp and +6 Nm between 3,000 and 5,500 rpm, stock ECU |
| Remap | Not required |
| Installation | Plug & Play on the stock airbox, reversible, no cutting or drilling |
| Fitting time | About 1 hour |
| Box contents | Enlarged airbox lid, fixing screws, instructions. Air filter not included |
| Made in | Italy, Soliera (Modena) |
Frequently asked questions
Is the air filter included?
No. This version contains only the enlarged airbox lid: you use it with the filter you already have. If you also need a filter, choose the kit with the 2G performance air filter.
Which filters can I use?
Any filter with the original dimensions: the stock filter and OEM-size performance filters.
Do I need to remap the ECU?
No. The lid is designed to work with the stock Monster 937 ECU: the quoted gains (about +4 hp and +6 Nm between 3,000 and 5,500 rpm) were measured without a remap.
Exhaust or intake: which should I upgrade first?
They do different jobs: the intake controls how much air gets into the engine, the exhaust how the gases get out. Our kit is designed to deliver results with the stock exhaust and costs a fraction of a full exhaust system.
Which versions does it fit?
It fits the Ducati Monster, Monster+ and Monster SP with the 937 cc Testastretta 11° engine (2021–2024).
Does it also fit the SuperSport 950?
No. It shares the engine but has a different airbox: this lid is specific to the Monster 937.
Can I return the bike to stock?
Yes. No cutting or drilling is needed: just refit the stock lid.
How long does it take to fit?
About one hour, with no modifications to the bike.
How long does shipping take?
All kits are in stock and ship within 24 hours, worldwide. You have 15 days from delivery to return the product if you're not satisfied.
Free up your Monster 937's intake: add the lid to your cart and we'll ship it within 24 hours.
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