Pipercross Panel Filter for BMW 4 Series F32 420i from 10/2013 with N20B20A engine. The must-have performance air filter upgrade for your BMW 420i. Replace the restrictive paper element in the factory airbox with a high flow, washable, reusable Pipercross foam panel filter and unlock stronger, longer-lasting airflow and dependable engine protection.
Why choose the Pipercross panel air filter for BMW 4 Series 420i
- Direct replacement panel filter for the OEM airbox. No modifications required.
- Up to 30% more airflow than a standard paper air filter.
- Bench tested for improved fuel economy, power and torque outputs.
- Longer service intervals than cotton filters. Designed to flow stronger for longer.
- Easy cleaning. No V-shaped wire grooves to trap dirt and restrict flow.
- Lifetime warranty for road use on all replacement and performance filters.
Multi-layer foam technology that keeps delivering
Unlike cotton or paper filters, Pipercross uses a special triple-layer foam construction to maximise both flow and filtration. The outer coarse foam captures larger particles, the middle medium foam traps most remaining contaminants, and the inner fine foam stops the rest. This progressive, multi-layer design maintains airflow and protects your engine across all conditions, helping the car sustain peak performance where thin cotton or paper elements start to choke as they load with dirt.
Made in Britain
Every Pipercross air filter is hand made in the UK at their Northamptonshire facility. The result is consistent quality, precise fitment and a product built to perform, mile after mile.
Fitment and compatibility
BMW 4 Series F32 420i, from 10/2013, N20B20A engine code. Direct OEM replacement panel air filter for the stock airbox.
What we think
We run Pipercross panel filters on our own cars and our customers love the upgrade. It is a simple, cost-effective performance enhancement that delivers excellent airflow, strong filtration and long-term value thanks to its washable, reusable design and lifetime road-use warranty.
Professional fitting and support
Want it fitted for you? Nforcd offers professional installation in Warwickshire. Request a fitting quote: Sales@nforcd.com.
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