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THE CHOSEN AIR FILTER BY THE WORLD'S BEST

Don't Take Our Word For It

There are thousands of 5 star reviews from extremely happy customers that have experienced the Green Filter difference.

Amazingly Perfect Fit!

Item looks great to say the least. The filter was an amazingly perfect fit for my vehicle. I drive a 2012 Ford Focus 2.0l and it changed out with the old stock filter in literally seconds. No having to wiggle it to fit and literally slid on the intake like butter. Tighten down the flat head bolt to hold it on tight and you're good to go! Great product!!

Z. Wilford

Charlotte, NC

The Filter Sounds Fantastic.

This filter sounds fantastic, fits in the stock airbox iwth the cover on or off, and isn't terribly expensive. I really enjoy hearing the turbo spool and blowoff through the new filter. Others online have said they've experienced marginally better fuel economy but its too early to say for me. If it is true, its another added bonus.

Bob Smith

Pittsburgh, PA

Awesome & Re-usable

Car can breathe! No but it really can now, the old paper filter is terrible. Replaced it with this one on my 2014 Ford Focus st and car even sounds better now. Can actually hear the intake induction sounds etc a lot more. You can also clean and re oil the filter to use it over and over. What a great bargain for a reusable filter.

Alex Palmas

Miami, FL

Modern, Advanced Designs

Green Filter USA may be a relative newcomer to the world of performance filters, but their products are truly making a splash. Green Air Filters feature modern, advanced designs and materials to provide not only unmatched flow, but also easy maintenance and a super long lifespan. What you get with Green is improved horsepower, awesome torque, and an air filter that truly pays for itself.

Jim Crawford

Sacramento, CA

Environmentally Friendly!

Green Air Filters' claim to fame is the fact that they are easily cleaned and renewable for as long as you own your vehicle, with the help of a Green Filter Cleaning Kit. This means that within about a year the filter will more than pay for itself, and you'll be doing your part to keep landfills free of dirty old air filters. Clearly, that green filter fabric does more than just look cool - it signifies the company's commitment to the environment.

Joseph Rogers

Detroit, MI

Fantastic Quality

I bought this for my 2014 Silver ST3 Focus. And man, I'm glad I bought it. It adds sound to the intake. Also I felt throttle responsive and the turbo can get more air. The stock filter is complete garbage so rip that out NOW and get this filter if you on the fence like I was. Let this seal the deal. 150% would recommend this filter. Also comes with cool green filter stickers.

Andrew Davis

Chicago, IL

Great For 2014 Focus ST1

This filter sounds fantastic, fits in the stock airbox with the cover on or off, and isn't terribly expensive. I really enjoy hearing the turbo spool and blowoff through the new filter. Others online have said they've experienced marginally better fuel economy but its too early to say for me. If it is true, its another added bonus.

Christopher Miller

Seattle, WA

Easy & Quick Replacement!

Item looks great to say the least. The filter was an amazingly perfect fit for my vehicle. I drive a 2012 Ford Focus 2.0l and it changed out with the old stock filter in literally seconds. No having to wiggle it to fit and literally slid on the intake like butter. Tighten down the flat head bolt to hold it on tight and you're good to go! Great product!!

Zachary Griffin

Dallas, TX

Adds More Surface Area!

Great filter adding more surface area than OEM but fits in the OEM airbox on my 2014 Ford Focus ST. If you remove the "end cap" from the airbox you will get more airflow and hear the turbo spool a bit more without being obnoxious. Gas mileage seems slightly better as well (avg about 1 mpg better). Filter element is great quality

Noah Bell

Atlanta, GA

I Regret Not Getting Sooner!

I wanted a full on intake (the one CPE offers for $400) but didn't have the money, I didn't want to spend $50 when that was $50 I could throw at the intake system itself. Well I finally caved and just bought it. Couldn't be happier. I feel no real differences, but my car sounds throatier combined with my Borla Touring exhaust system. Either way, I highly advise you get one!

James Powell

Baltimore, MD

I Highly Recommend This Filter!

Installation was an absolute breeze, it literally took me 2 mins to pull the old one out and out this one on and tighten the clamp. It definitely opens up the intake more and you hear nice deep sounds. All in all it's a great air filter and I highly recommend.

Dan Babcock

Boston, MA

Sound Quality Is Amazing!

It is a direct replacement for the Ford Focus ST air intake. I love that you can hear a lot more of the engine and the blow off sounds when you accelerate and step off the gas. The miles per gallon has also gone up at least 1 mile since I have installed. Excellent quality and price!

Lucas Reed

Denver, CO

My Car Can Finally Breathe!

Car can breathe! No but it really can now, the old paper filter is terrible. Replaced it with this one on my 2014 Ford Focus st and car even sounds better now. Can actually hear the intake induction sounds etc a lot more. You can also clean and re oil the filter to use it over and over. Great bargain for a reusable filter.

Gabriel Urtiaga

Austin, TX

Fits Like A Glove

Bought this for my 2016 Focus RS. Fit like a glove and increased airflow, plus increased noise as expected from installing any increased flow air filter. So far no complaints and happy with my purchase!

Michael H.

St. Louis, MO

She Growls Now

This filter replaced the stock air filter on a 2104 Focus SE. The engine makes a growling noise now when I get on it. I have noticed that my starts from first gear are better, as I am getting more power from the engine, and my computer tells me that I am getting a 0.5 MPG increase.
I am glad that bought this filter!

William F. Heronema

Cleveland, OH

Easy First Mod For Anyone!

It's a great product that made a difference to sound and fuel economy in my 17' ST. I noticed about a 2 mpg increase after the car relearned the new air flow rates. Also, there is a lot more induction noise and it makes the sound symposer not function until higher up in the rev range.

Max Lupfer

Phoenix, AZ

Nice Edition To OEM Intake

The green filter definitely offers a much more lively experience driving normally around town and at a spirited pace in the canyons. The filter provides a significant increase in induction noise and blow-off from the turbo. If you're looking for an enhanced sound experience but don't want to commit to a cold air intake, this is definitely a great option

Anthony Williams

Indianapolis, IN

You Need This Filter!

Best bang for your buck, period. Incredibly easy install, great quality, very satisfying sound, not obnoxious, and a very wallet friendly price. You should have no second thoughts with this purchase

Ryan Moore

Omaha, NE

Green Filter All Day!

This thing is a huge improvement if you're looking for a louder BOV noise! I plugged this guy straight into my 2016 ST in a matter of seconds and it was ready to go. I highly recommend this if you're looking for an inexpensive and simple way to improve the natural BOV and intake sounds.

Nathan Thompson

Milwaukee, WI

Countless Minutes Of Fun

Awesome air filter. Two minute install to countless minutes of fun. It opens the car up so much more and allows it to really breathe. For me it also gave increased turbo and blow off valve noise which sounds awesome on my 2013 Focus ST.

Thomas Robinson

Newark, NJ

WHOOOSH!

Got this for my 2014 Ford Focus ST. Save yourself some money from buying a new intake system and just get this! Leave the airbox cover off, and get that big "WHOOOSH" sound that you've been looking for!

Casey Scott

Salt Lake City, UT

Own A Focus ST? Buy A Green Filter!

EASY install. The sound difference is tremendous. You can now hear the turbo pulling in air and the BPV a lot! Power wise, it is most noticeable on overboost.

Jordan Gonzalas

Albuquerque, NM

Best Of All!

I tested a K&N Filter before this one in my Focus ST and it doesn't compare to the Green Filter. The Green Filter sounds better, performs better, and the mpg is better. So far so good!

Jorge Gomez

Richmond, VA

5 Star Performance!

Awesome product. Gives my 2015 SE hatchback sport package a nice growl under the hood now. I immediately noticed an improvement in acceleration and the car seems snappier now. Fuel mileage went up as well. On the highway I was getting 38 mpg. Now I am seeing 40-42 mpg. In the city not so much since I am having a lot more fun stepping on it to hear the intake sound.

Brian Mitchell

New York City, NY
Find for Your Green Filter

Green Filter's Technology Makes All The Difference

Woven Cotton

Deep pleats in the double-layered cotton create a 10-15% increase in filtration surface. This increase allows a greater volume of air to move more freely into your engine cylinders while maintaining superior filtration. Our specially designed cotton filter traps particles as small as 5 microns.

Steel Mesh

Steel wire mesh encases the cotton filter, providing strength and dent resistance so you can be sure your Green High Performance Air Filter will work under the toughest conditions.

Proprietary Lubricant

This oil creates a positive (+) magnetic charge, or ionic bond, with the filter's stainless steel mesh. The positive charge attracts the negatively (-) charged dust particles entering the filter, causing them to cling to the steel mesh and allowing the cotton to remain clear for maximum air flow.

Low Pressure Molding

Other filters use a simple pressure-molded injection process to bond the perimeter rubber to the interior components. That method saves manufacturing time, but in the process, a considerable amount of rubber can seep onto the filtering surface. While it may not look like much, that spill-over rubber can restrict as much as 25% of the intended air flow. We use a four-step production process which virtually eliminates rubber seepage and maintains maximum air flow through the filter.

Custom Molds

Our hand-molded, flexible rubber base offers an airtight seal and absorbs vibration. Our filter molds are created from an extensive on-site library of factory air boxes, with each part custom made on CNC machines. We don't reuse elements between filters or make universal molds, which means that when you buy a Green High Performance Air Filter you can be sure it will fit just like the one from the factory, with no modifications necessary.

In House Technology

Long before we were manufacturing a single air filter for your street-legal machine, we produced hundreds for the international motorsports industry. Our production technology is always improving with the most cutting edge processes and equipment. Also being committed to serving you, our product line is ever expanding to cover all of your needs. We stand by our guarantee of providing customers with what we think is the best filtering technology available.

It's not just better airflow

The benefits of Green Filter are not just about experiencing immediate gains, but there are long term ones as well.

Find for Your Green Filter

Better
Performance

Dynamometer bench testing on an 1800cc 4-cylinder engine showed that a Green High Performance Air Filter provided a 6.7% increase in horsepower over the same vehicle with a stock paper air filter.

Fuel
Efficiency

In an independent test performed on a 2008 Chevy, a 5.6% increase in fuel mileage was shown over the same vehicle with a stock paper air filter. This is the same test that manufacturers perform to estimate fuel economy on  new vehicles.

Made
In The USA

All Green Filters are made by hand in our Mount Braddock, Pennsylvania facility with materials manufactured in the USA.

Lasts a
Lifetime

Our filters are designed to be cleaned (with our biodegradable cleaner and synthetic oil) and reused. Not only will you notice a difference in your wallet, but you'll be helping the environment as well.

The Green Filter Guarantee

As the leading American Made Company with American Made products, we pride ourselves on our work ethic & customer service.

100% Guaranteed

All Green High Filters are designed to last for the lifetime of your vehicle and are covered by our Limited Lifetime Warranty.

Free shipping & returns

We stand by our product and offer fast and free shipping along with free returns or exchanges, no questions asked.

Instant customer service

We're available 24/7 through email and you can call us during our normal business hours found on our contact page.

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