--- product_id: 2942106 title: "High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium, Washable: Compatible with 2003-2021 Subaru: (See Product Description for Select Models) 33-2304" brand: "k&n" price: "€ 114.83" currency: EUR in_stock: true reviews_count: 11 category: "K&N" url: https://www.desertcart.gr/products/2942106-high-flow-original-lifetime-engine-air-filter-increase-power-premium store_origin: GR region: Greece --- # 50% airflow boost washable & reusable lifetime durability High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium, Washable: Compatible with 2003-2021 Subaru: (See Product Description for Select Models) 33-2304 **Brand:** k&n **Price:** € 114.83 **Availability:** ✅ In Stock ## Summary > 🚗 Power up your Subaru with the filter that never quits! ## Quick Answers - **What is this?** High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium, Washable: Compatible with 2003-2021 Subaru: (See Product Description for Select Models) 33-2304 by k&n - **How much does it cost?** € 114.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/2942106-high-flow-original-lifetime-engine-air-filter-increase-power-premium) ## Best For - k&n enthusiasts ## Why This Product - Trusted k&n brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Smart Performance:** Washable and reusable design reduces waste and saves you money over 10+ disposable filters. - • **Effortless Installation:** Pre-oiled and ready to drop in—transform your engine’s breathing in minutes without tools or hassle. - • **Built to Last a Lifetime:** Premium, rugged construction with a no-hassle limited lifetime warranty—upgrade once, never replace. - • **Unleash Hidden Horsepower:** Boost your Subaru’s airflow by up to 50% for sharper acceleration and power gains. - • **Proven on the Track, Perfect for the Road:** Tested on the world’s toughest race circuits, delivering race-grade performance to your daily drive. ## Overview The K&N High-Flow Original Lifetime Engine Air Filter is engineered to increase horsepower and acceleration by improving airflow up to 50%. Designed specifically for 2003-2021 Subaru models, it features a durable, washable, and reusable cotton gauze media that lasts the lifetime of your vehicle. With easy installation, a limited lifetime warranty, and eco-friendly benefits, this premium air filter delivers race-tested performance and long-term savings for discerning Subaru drivers. ## Description K&N performance High-Flow Air Filters are engineered to improve engine performance by increasing airflow up to 50%. Unlike disposable paper filters which must be frequently replaced, K&N Air Filters are washable, reusable, and engineered to last for the life of your vehicle. K&N air filters are backed by our famous 10-Year/Million Mile Limited Warranty, and they provide an environmentally friendly way to reduce landfill waste by avoiding disposable filters. Engineered to fit easily into your factory air box, installation can be completed in a matter of minutes! K&N develops and tests each product on the world’s toughest race tracks, so we can bring the highest level of performance to your daily driving. Join the millions of customers who have saved money and improved vehicle performance by upgrading to K&N filtration.Compatible Vehicles:2011-2015 LANCIA Thema2006-2007 SUBARU B9 Tribeca2016-2017 SUBARU Crosstrek2008-2017 SUBARU Exiga2008-2019 SUBARU Forester2011-2013 SUBARU Forester Turbo2008-2016 SUBARU Impreza2007-2009 SUBARU Impreza II2007-2008 SUBARU Impreza II WRX2007-2008 SUBARU Impreza II WRX STI2008-2008 SUBARU Impreza III2008-2008 SUBARU Impreza III WRX STI2008-2014 SUBARU Impreza WRX2008-2014 SUBARU Impreza WRX STi2005-2019 SUBARU Legacy2005-2009 SUBARU Legacy GT2003-2010 SUBARU Legacy III2003-2014 SUBARU Legacy IV2014-2019 SUBARU Levorg2003-2021 SUBARU Liberty2009-2014 SUBARU Liberty Exiga2004-2019 SUBARU Outback2003-2008 SUBARU Outback II2009-2009 SUBARU Outback III2005-2006 SUBARU Outback XT2005-2014 SUBARU Tribeca2012-2021 SUBARU WRX2012-2018 SUBARU WRX STI2012-2017 SUBARU XV2013-2015 SUBARU XV Crosstrek Review: This filter really rocks!! - I bought the K&N air filter for my 2016 Subaru Outback with 2.5i engine and installed it on 7-21-2016. It fits perfectly- as mentioned by others the only way it fits in this car's air box is to turn the filter 90 degrees so the filter slats are running vertically, not horizontally as it does on the OEM filter. The filter looks square but is not a perfect square. Build quality is much better and more solid than the flimsy OEM or aftermarket paper air filters. The deep side of the filter (air input) faces the front of the car which I installed into the front portion of the air box. I noticed right away that throttle response was better and much more immediate, and the engine sounds and runs more smoothly. After 2 weeks of having it installed acceleration and power have really improved. The lackluster acceleration was a drawback I've had with this car in exchange for good fuel economy, but I love everything else about it. After having had the K&N filter installed for 2 weeks acceleration has really improved to where I am very impressed and am having even more fun driving it. This is my fifth Subaru with the 2.5i engine. I was thinking my next Subaru would be with the 6 cylinder but no longer, thanks to this air filter. Apparently the engine computer system needs time to adjust to the increased air flow. This is not imagined on my part, power and speed have considerably improved, as well as smoother acceleration. Feels like power has increased by several horsepower. The car also idles at a lower RPM. I have not yet determined any increase in fuel economy- I've been having too much fun driving this car faster and harder than before. This filter really does great things for my car's performance! Don't hesitate to try it. Review: It's a k&n. It's good enough for a title - Easy to use. Easy to clean, easy to reuse. In some cases there is a noticeable bit of power difference because of the air to fuel ratio. In some cases you might not notice it. It's not a huge jump in power but it can be noticeable in the right vehicle. I put them in everything. I got one in my outback. I had one in my RX. I had one in my Sequoia had one in my fusion. Every vehicle I've had I've put one in. I have not put one in my lx470 yet because it's going to need much more work than an air filter can do right now. So I haven't put that expense into it. But I will because I know how it performed in the Sequoia with the same engine. It was a noticeable difference and when you're at about 6,000 7,000 lb of weight, a noticeable difference can be significant matter how small of a difference it is that it's noticeable ## Features - ENGINEERED POWER: State-of-the-art air filter media is designed to increase horsepower and acceleration as well as improve overall engine performance - RUGGED CONSTRUCTION: K&N Air Filters are manufactured with durable, premium materials and state-of-the-art construction methods to last a lifetime - 4 LAYERS OF PROTECTION: Multiple layers of premium cotton gauze treated with a specially-designed tacking agent work together to create an intricate mesh of engine filter media that is designed to block and trap harmful contaminants - CLEAN ONCE EVERY 5 YEARS: Engine air filter only needs cleaning every 75,000 miles under normal highway driving conditions (based on the average miles driven per year of 15,000 miles) - ULTIMATE LONGEVITY: No-hassle limited lifetime warranty on stock replacement K&N air filters- limitations apply - EASY INSTALLATION: K&N Air Filters are pre-treated and ready to drop into your factory air box- they are one of the easiest and most cost-effective vehicle upgrades for quick performance gains - ECO-FRIENDLY: Using a washable, reusable engine air filter helps reduce replacement air filter waste- a K&N air filter is designed to last longer than 10 or more disposable filters - MADE IN USA: K&N Air Filters are proudly made in the USA for trusted quality & reliability ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000COC0GQ | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #29,026 in Automotive ( See Top 100 in Automotive ) #439 in Automotive Replacement Air Filters | | Brand Name | K&N | | Customer Reviews | 4.7 4.7 out of 5 stars (2,275) | | Fit Type | Vehicle Specific Fit | | Global Trade Identification Number | 00024844111562 | | Included Components | K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: Compatible with 2003-2019 Subaru (Forester, Legacy, Outback, Impreza, WRX, Levorg, Crosstrek, Tribeca) 33-2304 | | Item Dimensions L x W x H | 4.53"L x 4.09"W x 0.67"H | | Item Type Name | K&N 85-9541 Gasket | | Item Weight | 0.4 Kilograms | | Manufacturer | K&N | | Manufacturer Part Number | 33-2304 | | Manufacturer Warranty Description | No Warranty | | Model Number | 33-2304 | | OEM Equivalent Part Number | 16546AA090, 16546AA10, 16546AA10A, 16546AA120, 16546AA12A | | Product Grade | Replacement Part | | Shape | Rectangular | | UPC | 024844111562 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** K&N - **Fit Type:** Vehicle Specific Fit - **OEM Part Number:** 16546AA090, 16546AA10, 16546AA10A, 16546AA120, 16546AA12A - **Product Dimensions:** 4.53"L x 4.09"W x 0.67"H - **Product Grade:** Replacement Part ## Images ![High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium, Washable: Compatible with 2003-2021 Subaru: (See Product Description for Select Models) 33-2304 - Image 1](https://m.media-amazon.com/images/I/81aX95EH7XL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: K & N official website says this model filter fits a 2014 Subaru Outback. The seller here on Amazon says this filter does not fit it....?** A: The heading says 2003-2019 Subaru Outbacks and more. **Q: Anybody try this in a 2016 Subaru Crosstrek? Did it fit and is it worth the extra cost?** A: I have it on my '16 Crosstrek. I noticed a little better mileage, and a slight bump in HP. It's also easy to clean and I never have to replace it **Q: Is this filter run dry or oiled?** A: Hi, it uses a proprietary fine oil that is sprayed onto the substrate filter material you can clean the filter with they're cleaning spray and water allowed to dry and then reapply the oil about once every couple of years. **Q: Is this filter pre-oiled? Is it usable out of the box or needs to be oiled before installing?** A: It is pre-oiled, you just drop it in after take it out of the box, then you should inspected every 15-20000 mile to cleaned an re oiled with Original K&N cleaning/oiling kit(about$10) and last forever. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This filter really rocks!! *by G***5 on August 3, 2016* I bought the K&N air filter for my 2016 Subaru Outback with 2.5i engine and installed it on 7-21-2016. It fits perfectly- as mentioned by others the only way it fits in this car's air box is to turn the filter 90 degrees so the filter slats are running vertically, not horizontally as it does on the OEM filter. The filter looks square but is not a perfect square. Build quality is much better and more solid than the flimsy OEM or aftermarket paper air filters. The deep side of the filter (air input) faces the front of the car which I installed into the front portion of the air box. I noticed right away that throttle response was better and much more immediate, and the engine sounds and runs more smoothly. After 2 weeks of having it installed acceleration and power have really improved. The lackluster acceleration was a drawback I've had with this car in exchange for good fuel economy, but I love everything else about it. After having had the K&N filter installed for 2 weeks acceleration has really improved to where I am very impressed and am having even more fun driving it. This is my fifth Subaru with the 2.5i engine. I was thinking my next Subaru would be with the 6 cylinder but no longer, thanks to this air filter. Apparently the engine computer system needs time to adjust to the increased air flow. This is not imagined on my part, power and speed have considerably improved, as well as smoother acceleration. Feels like power has increased by several horsepower. The car also idles at a lower RPM. I have not yet determined any increase in fuel economy- I've been having too much fun driving this car faster and harder than before. This filter really does great things for my car's performance! Don't hesitate to try it. ### ⭐⭐⭐⭐⭐ It's a k&n. It's good enough for a title *by J***N on September 16, 2024* Easy to use. Easy to clean, easy to reuse. In some cases there is a noticeable bit of power difference because of the air to fuel ratio. In some cases you might not notice it. It's not a huge jump in power but it can be noticeable in the right vehicle. I put them in everything. I got one in my outback. I had one in my RX. I had one in my Sequoia had one in my fusion. Every vehicle I've had I've put one in. I have not put one in my lx470 yet because it's going to need much more work than an air filter can do right now. So I haven't put that expense into it. But I will because I know how it performed in the Sequoia with the same engine. It was a noticeable difference and when you're at about 6,000 7,000 lb of weight, a noticeable difference can be significant matter how small of a difference it is that it's noticeable ### ⭐⭐⭐⭐⭐ The Best Engine Air Filter on the market *by S***H on January 24, 2026* High Quality Engine Air Filter. Even recommended by my Subaru Dealer. Fantastic to have a washable reusable option! ## Frequently Bought Together - K&N High-Flow Original Lifetime Engine Air Filter: Increase Power: Premium, Washable: Compatible with 2003-2021 Subaru: (See Product Description for Select Models) 33-2304 - K&N Premium Cabin Air Filter: High Performance,Washable, Clean Airflow to your Cabin: Designed For Select 2008-2019 Subaru (Levorg, XV, Forester, WRX, Crosstrek, Impreza), VF2055 , Black - K&N Air Filter Cleaning Kit: Aerosol Filter Cleaner and Oil Kit; Restores Engine Air Filter Performance; Service Kit-99-5000, Multi --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/2942106-high-flow-original-lifetime-engine-air-filter-increase-power-premium](https://www.desertcart.gr/products/2942106-high-flow-original-lifetime-engine-air-filter-increase-power-premium) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-29*