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Your cart is empty.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:
- 2011-2021 RAM 1500
- 2019-2021 RAM 1500 Classic
- 2012-2019 DODGE 1500
- 2019 DODGE 1500 Classic
- 2012-2018 DODGE 2500
- 2012-2018 DODGE 3500
- 2010-2018 RAM 2500
- 2011-2018 RAM 3500
- 2014-2017 DODGE 4500
- 2014-2017 DODGE 5500
- 2014-2017 RAM 4500
- 2014-2017 RAM 5500
- 2012-2014 RAM Ram
- 2002-2010 DODGE Ram 1500
- 2003-2010 DODGE Ram 2500
- 2003-2009 DODGE Ram 3500
carefulShopper
2025-09-05 15:44:51
*****Update dec 2017: No issues at all, still great mileage! Saving me lots of money...even more whenl gas goes to $8.00 a gallon!Excellent! Perfect fit and seal around the lip of the filter. I am comparing performance to a brand new stock Toyota dealer supplied filter. Wasn't expecting much. Was I surprised & this filter delivered impressive results.1. No low /high speed noise or whine on my 4.6L v8. In fact, just a quiet, mellow rumble that really sounds great. Nothing radical, just sounds like it should for a big, powerful engine running well.2. Situation where I notice the biggest difference is in town, low speed, starting from stops, and especially when the engine is still cold. It's like the engine was driving with it's nose stopped up but now, the sound is clear and flowing. By that I mean when engine is cold or starting from a stop, any hesitation is gone. It breaths right through it. Engine does not sound stopped up and interestingly, the transmission shifts more smoothly, too. Not sure how the air filter plays into that but smarter tranny shifting is a definite result and improvement e.g. it tends to release /shift into a lower gear sooner, which increases mileage in and of itself. MY dash MPG gauge reflects the difference I am hearing in sound and shifting leads to higher MPG.3. I have an instantaneous and average MPG gauge and I can see in all my driving situations (no trailer or big load) getting 2-3 MPG more. That's a 10-15% increase. I am impressed. But with my MPG gauge, I have a highly trained foot with no lead.4. Highway cruising under 57mph is 24mpg flat highways; over 60 & MPG drops noticeably. Combined mileage 18-21 MPG on this big Tundra.Maintenance: Says it's good for 50k miles. You don't have to clean & re-oil until then. I bot their kit for 10$ that comes with a cleaner spray, oil spray, and clear instructions. I would sugg using the SPRAY oil to recharge the filter and not the oil in a spout bottle where you have to drip it onto all the filter folds. A Spray is MUCH quicker and more uniform. So it comes either way as a spray or in a drip bottle & price is about the same so not a factor.Overall I am really pleased. At a price of 40$ incl shipping I cannot think of a negative. After ordering my filter I noticed the price went up 30% for no apparent reason. The 4.6 Tundra just rolls easier,... and it's like a rag was taken out of it's nose with the K&N 33-2387 filter and the engine can finally breathe!
Nightfall450us
2025-07-10 15:01:02
I have heard of K&N for awhile and finally made bought one and the difference is night and day. It will fit the stock air box no problem. My truck has been modified so I have a cavern R muffler so performance may be different from stock exhaust. My truck gained some hp very time I get on the gas response has been smother and faster. This also improved my exhaust note. I also gained better gas milage in the city and on the highway. This is a reusable filter and there is a kit with instructions also a video on how to clean it. This should help save me some money and I love it. Worth a try and Definity will buy again
Customer
2025-06-29 11:52:03
Great product and made the vehicle breath better.
Just some dude
2025-06-19 10:58:32
Works great, regret waiting so long to get it.
E. H.
2025-06-04 21:51:40
My truck is a 2010 Toyota Tundra 5.7 crewmax. My mpg on my dash went up about 1 mpg so it is getting me better gas mileage there is a small annoying whistle in between 1 and 2 on the rpms I only noticed it sometimes but when I did it was annoying. It is a small sacrifice for the performance and mpg it is giving me a boost on. At least that is the way I feel I am sure once my wife drives it I will hear more about the whistling.
RFB
2025-05-28 13:28:33
It is a perfect fit and easy installation on my 2010 Tundra.
M. Sharrow
2025-05-06 11:42:46
Pros:Excellent filter with excellent airflow to your engine.Will last longer than the vehicle with routine cleaning and spray oil, so saves money in the long haul.Cons:Not a "Con" for this filter.. a "Con" for Toyota: Installing this filter exposes a flaw with the Toyota 5.7 Liter engine, where a very high pitch sound is generated by a metal mesh located behind the throttle body. The OEM filter masks this noise (likely becuase of its density and restricting airflow). To correct this, remove the two bolts holding the throttle body to the intake manafold (after first removing the air filter housing) and then use a pair of wire snips to clip out the wire mesh from the gasket behind the throttle body. Replace and high pitch noise goes away. (I installed a new stereo arround the same time as this filter and thought the noise was the radio... very high pitch and sounded like it was from the speakers inside the cabin... enough to drive someone crazy looking for it).
Jorge Alarcon
2025-05-04 13:08:57
I had a K&N filter in my Toyota Tacoma and was so pleased with it, I purchased one for my 2010 Toyota Tundra. After I installed the filter on my Tundra, it makes a whistling noise (as stated in a lot reviews). The whistling noise occurs at certain times/acceleration...probably when the air intake is increased. I can hear the noise and detracts from my driving experience. I know the filter works in removing debris from the air, but the noise makes me give this filter 3 stars. If it didn't make noise, I would give it 5 stars.
بدون اسم
2025-04-11 11:42:37
ممتااااز
Rankin
2025-04-03 18:16:31
helped a bit.. I don't regret the purchase
john n.
2025-03-25 11:25:06
ship real fast. received nice and good pckage. thanks
ahmed alshammari
2025-02-18 17:36:30
تم تركيبه على جيب لكزس 2015 ØŒ ممتاز تØس الموتر منتعش
Don Metro
2025-02-04 11:23:11
Fits like piece of cake, will come back for update
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