K&N
K&N BM-1821 BMW R18 1802cc Air Filter (2020-2021) - High-Flow Washable Reusable OEM Replacement Drop-In
K&N BM-1821 BMW R18 1802cc Air Filter (2020-2021) - High-Flow Washable Reusable OEM Replacement Drop-In
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
Couldn't load pickup availability
K&N BM-1821 Intake Filter Insert for BMW R 18 1,802 cc 2020 to 2021
Unlock smoother breathing and crisp throttle feel on your BMW cruiser with the K&N BM-1821 intake filter element. This serviceable, cotton-gauze filter is a factory-spec replacement for the BMW R 18 1,802 cc models from 2020 to 2021, sliding straight into the stock air box for an effortless upgrade. Reusable, washable and built to last, it is a smart performance-enhancing choice for riders who want quality, longevity and value.
At MJ Modifications we run K&N filters on our own builds and customer bikes. The BM-1821 has proven to be a favourite thanks to its robust construction, easy maintenance and noticeable improvement in intake efficiency. UK riders looking for a long-life motorcycle air cleaner for everyday use and touring will find this filter delivers exactly what they want.
Why this filter stands out
- Direct fit for the factory air box on BMW R 18 1,802 cc 2020 to 2021 - no cutting, no fuss
- High-flow cotton media that helps the big boxer breathe more freely
- Washable and reusable element for long-term savings and reduced waste
- Durable construction designed for repeated cleaning and re-oiling
- Ideal upgrade for commuting, weekend rides and long-distance touring
- Popular choice across the UK for riders searching for BMW R 18 intake upgrades
Perfect for these searches
BMW R 18 intake filter, BMW R18 air cleaner element, washable motorcycle intake, reusable cotton gauze filter, performance filter insert UK, BMW 1802 cc filter element, K and N BM1821, R 18 airbox filter, BMW R18 upgrade filter, lifetime motorcycle filter.
Compatibility
BMW R 18 1,802 cc - model years 2020 and 2021.
Part number
BM-1821
Fitting and support
This is a straightforward drop-in element for the stock intake housing. If you prefer professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.
Need to confirm fitment
We are happy to double-check compatibility. Send your UK registration or the last 7 digits of your VIN to info@mjmodifications.co.uk for fast assistance.
Upgrade your BMW R 18 with a premium, serviceable intake filter that is built for miles of reliable performance. The K&N BM-1821 is the go-to reusable filter element for riders who want dependable quality and easy maintenance.
Share
