Performance Air Filter for BMW 5 Series E60 / E61, 6 Series E63 / E64 V8
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High-Velocity Induction: BMC Performance Intake Upgrade for BMW N62 & N43 Platforms
Who It’s For: Engineered for BMW 5-Series and 6-Series owners running the sophisticated [N62 V8 or N43] powerplants who are tired of the stock sluggishness and restrictive intake acoustics.
The Symptom: The factory intake system on the E60 and E63 chassis is designed primarily for silence and long-term service intervals, not maximum volumetric efficiency. It utilizes a thick, pleated paper filter that creates a significant pressure drop as air struggles to pass through the dense fibers. This creates a "laggy" throttle feel in these heavy Grand Tourers, particularly when trying to utilize the low-end torque of the N62 V8 to move the 4,000lb+ mass of the vehicle from a standstill or during high-speed overtaking.
The Engineering Fix: This BMC system replaces the restrictive OEM paper element with a high-flow, multi-layered cotton gauze filter. By utilizing low-viscosity oil and an epoxy-coated alloy mesh, we decrease the resistance of the air column entering the intake manifold.
This reduces "pumping losses," allowing the engine to spend less energy pulling air in and more energy sending power to the rear wheels. The result is a 7-micron filtration rating that actually outperforms the OEM 10-micron standard while significantly increasing air velocity.
Why Mechanics Choose This Kit
- Enhanced Volumetric Efficiency: By smoothing the airflow and increasing the available surface area, this filter allows the N62 and N43 engines to reach their target MAP (Manifold Absolute Pressure) faster.
- Full Moulding Technology: Unlike cheaper filters that use glued joints prone to heat-soak failure, BMC uses a single-mould process that prevents breakage and ensures a perfect airtight seal within the factory airbox.
- Washable & Regenerable: This is the last filter your BMW will ever need. It is designed to be cleaned and re-oiled, maintaining peak flow characteristics for the life of the vehicle.
Technical Specifications
| Fitment | BMW 5 Series E60 / E61 520i (2007-2010), 540i (2005-2010), 545i (2003-2005), 550i (2005-2010); 6 Series E63 / E64 645Ci (2003-2005), 650Ci (2005-2011) |
| Dimensions | 184/273mm x 312mm panel |
| Part Number | BMC FB421/01 |
Compatibility & OEM Reference
Fits the following vehicles (BMC fitment data):
- BMW 5 Series (E60,E61) 520i (170 HP) | 2007-2010
- BMW 5 Series (E60,E61) 540i (306 HP) | 2005-2010
- BMW 5 Series (E60,E61) 545i (333 HP) | 2003-2005
- BMW 5 Series (E60,E61) 550i (367 HP) | 2005-2010
- BMW 6 Series (E63,E64) 645Ci (333 HP) | 2003-2005
- BMW 6 Series (E63,E64) 650Ci (367 HP) | 2005-2011
OEM Cross Reference (BMC): BMW 13717521023, 1371752103701, 13717521037
The Performance Promise
Buy with confidence. As specialists in European performance platforms, we verify every fitment for the N62 and N43 chassis. Backed by real automotive experts and fast shipping to get your BMW back on the road with the breath of air it deserves.
Common Questions
Which BMW models does it fit?
BMC lists the E60 / E61 520i (2007-2010), 540i, 545i and 550i, and the E63 / E64 645Ci and 650Ci.
Is it a direct fit?
Yes. It replaces the factory element in the stock airbox with no modifications.
Can I clean and reuse it?
Yes. Wash and re-oil it with a BMC regeneration kit.
How fine is the filtration?
The multi-layer oiled cotton traps particles down to 7 microns.
What will I notice after installing it?
Sharper throttle response and a stronger intake sound.
Fitment
Fitment
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Warranty
Warranty
All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]

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