BMW 5 40D / 40D Mild Hybrid DNA Air Filter

DNA replacement air filters are designed to increase hp and acceleration while providing excellent filtration. These filters are washable and reusable and are custom designed to fit into your existing factory air box. This makes them very good value for money.

Features

Filter Use

Road & Off Road

Filter Design

DNA's Advanced FCd

OEM Part Number

13718577170, 13718577171, 13718691835

Filtering Efficiency

98%-99%

Increase in Air Flow

29.45%

DNA Air Filter Air Flow

228.70 CFM

OEM Air Filter Air Flow

176.70 CFM

Related Models

Air Flow Data

Power by quality you can trust!

The DNA High Perfomance Air Filter +29.45% increase in air flow & 98%-99% filtering efficiency

Power by quality you can trust!

We, at DNA, proudly introduce a filter that can last the life of the vehicle. Strict quality control for construction & materials, chosen only by their highest quality, are some of the factors that allow us to offer a Lifetime Warranty!

The Anatomy

This is what Power is made of!

A DNA High Performance Filter is a high quality, next generation multilayer cotton gauze, flameproof, oil impregnated air filter.

This very special cotton is designed by DNA's R&D engineers for High Performance filtering purposes. The basic media is a non woven surgical cotton gauze with a modified TEX & THREAD, with extremely high strength of break. This unique cotton media, actually is a “hairy hybrid” featuring extremely high air flow rates and excellent filtering efficiency that exceeds 98%.

FAQs About DNA Filters

Human "technology" inspiration!

The technology that our DNA filter uses to clean the air is surprisingly common to all of us. It is part of our body; we use it constantly to stay alive! It is part of the Human respiratory system that filters the air we inhale! Tiny moistened hairs called cilia protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose with the breathed air. The DNA filtering cotton media is exactly that, millions of tiny fibers that are oiled! This “hairy hybrid” as we call it, is a genius combination of cotton fibers per square millimeter. The Tex & Thread, of this unique cotton, is a result of intensive research and testing, by DNA’s development engineers. The “hairy hybrid” impregnated with DNA’s special filter oil, is transformed into the remarkable DNA media that provides very high filtering efficiency and extremely high flow rates.

Trap "enemies" by static charge!

We designed the DNA filter to aquire a positive static charge as the air passes through the pleated and oiled filter media. This weak static chargewill very effectively “pull” on the oiled cotton fibers, the debris and dust that are in the air; remember in science class at school, the pen rubbed against wool that can attract small bits of paper, experiment? This is exactly what happens, as air flows through the filter, debris even as small as 5 microns will change course and stick onto the fibers, regardless if the “holes” between the fibers can be as large as 150 microns! The first layer of debris on the fibers will then absorb some oil, get statically charged and become part of the filtering media! And guess what, it will start attracting new debris assisting the cotton media in its filtration chore! Finally, debris will continue building up on the surface of the filter, as air passes through, until it is totally covered.

Extreme testing environment

Our filters have being successfully tested even in the harshest environment during the DAKAR Rally! Through Argentina, up to the Andes, and down to the Atacama Desert in Chile. The dreadful “Fesh- Fesh”(Guadal) fine powder desert sand of the Atacama Desert, was successfully kept out of the race engines, outperforming the foam filters! So the myth is busted, the DNA filters can successfully be used in any environment, on and off the road, in the desert or the outback, DNA will be there to protect you.

Here comes increased torque & power

The DNA filter will also smoothen out the air flow stream, as it passes through the filter, reducing turbulence and sending smooth clean & fresh air towards the engine intake, increasing torque and power. Additionally to the high air flow, smooth and unified air flow is very important. This explains why we see a decrease in power output when testing a bike or car on the dyno “without” a filter as the circulation of air in the air box is disturbed and the result is turbulence and low power output.