⚡ Drive smarter, not harder — power that lasts a lifetime!
The K&N High-Flow Original Lifetime Engine Air Filter (33-5092) is a premium, washable air filter designed specifically for 2019-2021 Subaru WRX STI models. Engineered to boost horsepower and acceleration, it features four layers of cotton gauze for superior contaminant filtration. With a maintenance interval of 75,000 miles and a limited lifetime warranty, this eco-friendly upgrade offers durable, reliable performance made in the USA.
| Manufacturer | K&N Engineering |
| Brand | K&N |
| Model | R |
| Item Weight | 1.21 pounds |
| Product Dimensions | 10.44 x 11.56 x 1.75 inches |
| Country of Origin | USA |
| Item model number | 33-5092 |
| Is Discontinued By Manufacturer | No |
| Exterior | Machined |
| Manufacturer Part Number | 33-5092 |
| OEM Part Number | Subaru 16546AA180 |
R**
19 sti
Couldn’t have fit any more perfect on my ‘19 sti, installation took a whole 5 minutes, remove the two bracket bolts to the body pop the two latches and pull back towards the front of the car and pull filter out at same time.Quality difference from oem paper filter was an obvious difference all around, definitely recommend this
C**S
Fit my 2019 WRX STI
I'm not sure if this is why I can now hear the woosh of my turbo coming from the engine compartment being I also added a Perrin radiator cover at the same time, but I like it.
T**.
K&N is thee best
Always have purchased K&N air filters for all of my cars, great product and it’s reusable!
V**O
Hard to install
In general, It is a good filter, but installation is not easy.
A**O
Perfect fit for 2021 WRX STI
Fits like a glove on my 2021 Subaru WRX STI, I can hear the intake swoosh now, sounds better than factory filter. Being a stock intake, it is a pain to install, but it's worth the effort and you can sometimes get it for a reduced price.
D**E
Fits 2019 Subaru STi!
This fits my 2019 STi perfectly like the OEM filter. I did not notice much difference, MAYBE a tiny bit more intake noise, but it could be a placebo. You do not need any additional engine tuning to use this filter as it is not modifying the intake tube diameter or MAF location, you can be 100% assured about this.
J**L
WRX STI 2019 - Fits like a glove
Working as intended! No more having to replace the filter every oil change, just wash it off and your good!
R**O
Sgood products subaru wrx sti 2019
Sgood products subaru wrx sti 2019
Trustpilot
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