K&N BM-1121 Replacement Air Filter for BMW R nineT 1170 cc 2020–2021
Upgrade your BMW R nineT intake with the K&N BM-1121 Replacement Air Filter. This high-flow, washable and reusable motorcycle air filter is a direct drop-in OEM replacement designed to optimise airflow and filtration for the 1170 cc R nineT engine. If you are searching for BMW R nineT air filter, performance air filter, replacement air filter, intake filter, engine air filter or K&N BM-1121, this is the performance upgrade that keeps your bike breathing freely while delivering durable, long-term service.
Why choose the K&N BM-1121?
- High-flow performance design to help your engine breathe better and respond crisply
- Washable, reusable cotton gauze media for long service life and excellent filtration
- Direct-fit, drop-in panel filter that replaces the factory air filter element with no modifications
- Durable construction engineered for repeated cleaning and re-use
- Great everyday upgrade for throttle response and intake sound
- A smart, sustainable alternative to disposable paper filters
We run the K&N BM-1121 ourselves and our customers consistently report smooth, clean airflow and strong, repeatable performance. It is a simple, cost-effective intake upgrade that you can service over and over again.
Compatibility
Fits BMW R nineT 1170 cc models for 2020 and 2021. Please use our product recommender to double-check fitment, or contact us if you are unsure.
Compatibility check before dispatch
To ensure your order is correct, we run a fitment check prior to dispatch. Provide your UK registration or the last 7 of your VIN at checkout and we will confirm compatibility.
Fitting and support
This is a straightforward DIY swap for the factory filter, but if you would like professional installation, Nforcd offers fitting in Warwickshire. Request a quote at Sales@nforcd.com.
Part number
K&N BM-1121
Search-friendly terms
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Questions about fitment or availability? Email Sales@nforcd.com and we will be happy to help.