air-filters-direct-fit

K&N 33-2640 - Air Filter

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$51.84

$94.99

You save: $43.15 (45%) off MSRP

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This part fits

  1. 1988 Porsche 944 S Naturally Aspirated 2.5L L4 cc:2475
  2. 1987 Porsche 944 S Naturally Aspirated 2.5L L4 cc:2475
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About this product

Part #: 33-2640

K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

More Details

Diameter Inside (in.)OEM
Diameter Outside (in.)OEM
Filter MaterialCotton Gauze
Filter Re-Oiling Amount2.17 oz (64 ml)
Filter StyleDry
Height (in.)1.188
Outside Length18.813 in (478 mm)
Outside Width5.688 in (144 mm)
ShapePanel (Flat)
Width (in.)5.688
Additional Documents
  1. Technical Bulletinpdf

See what our community says about kn products

Anton Vorukov

15

Anton Vorukov
2015 Mazda CX-5
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What made you choose this particular product?
It makes the car run better
Is this your first time buying from this brand? Did you consider other brands?
No and I won’t get anting else then this brand
View on Anton's build
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What made you choose this particular product?
Far better than the standard cone filter, nicer sounding and air intake doesn’t reduce the power.
View on CJ's build
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What made you choose this particular product?
I previously installed a K&N on my Audi and it worked like a champ so I decided to give it a try on my new Genesis.
Is this your first time buying from this brand? Did you consider other brands?
No, I have previously used this product and I didn't consider using any other brand.
Was it easy to install? Any installation tips that will help others?
Yes, It is just a drop in filter.
Once you've had a chance to use the product, did it meet your expectations?
Yes, it made the car run a lot better than it previously did because the previous owner never replaced the air filter and it was in bad shape.
View on Ryab's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Appearance is all black. Performance improvements over stock air filter.
Is this your first time buying from this brand? Did you consider other brands?
Did not consider other brands, first-time buyer.
Was it easy to install? Any installation tips that will help others?
Easy to install. Takes about an hour for first-timers, 30 minutes when you know how to do it.
View on Dallas's build
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What made you choose this particular product?
Stock appearance, better performance
Is this your first time buying from this brand? Did you consider other brands?
No and not really.
Was it easy to install? Any installation tips that will help others?
So easy a caveman could do it.
Once you've had a chance to use the product, did it meet your expectations?
Yep
Any additional comments?
I also modified the factory airbox to allow more COLD air in. Tested this setup against several after market options and tied or beat them all.
View on Pat's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

About K&N

K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and air intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies.

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