“Blue” air filters for BMW were specially made for us by Green, a European manufacturer with motor sport experience and excellent production methods
The filters are made to a very high standard to ensure the best airflow and cleaning properties
They enjoy better air flow than many similar filter types, and the low pressure manufacturing process ensures that there is very little spillage of the black plastic into the woven cotton sheets (more spillage = less filtering area) The facts: Deep pleats in the double-layered cotton create a 10-20% increase in filtration surface
This increase allows a greater volume of air to move more freely into your engine cylinders
Blue uses 2 layers of woven cotton compared to most other brands who use 4 layers of cotton gauze
There are 3 main benefits to woven cotton: it’s thinner, holds oil better, and is stronger
Blue filter’s rubber mouldings are almost exact around the edges with no wasted surface area
Using this more efficient process the air flow is greater than the same size filter that is injection moulded
Blue Longlife Performance Filters are designed to be oiled
The oil creates a positive (+) magnetic charge with the mesh, which attracts the negatively (-) charged dust particles
The dust and dirt builds around the mesh to form a tunnel
This allows the cotton to remain cleaner for maximum flow
Normal servicing every 50 000 km or once a year
In very dusty conditions re-oiling or servicing may be needed
Pleat design: The filters have pleats that are parallel to the width
This makes the filter more rigid and stronger and reduces air leaks
Stainless steel mesh on both sides
Custom Fitment Tabs (for square filters only)
Plastic air-boxes can warp out of shape or even distort from the heat radiated from the engine
These tabs also benefit the filter by centring and aligning it in the air box, so the filter is evenly sealed
Easy to fit, just replace the original with Blue Filter
Warning sticker for air box
These merits are not found on any regular paper type filter
Despite the long period between servicing the clever multi-layer design ensures excellent filtering properties.
