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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
AEM 2018 Subaru WRX STI 2.5L H4 F/I Cold Air Intake System - Wrinkle RedThe AEM 21 836WR Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno tested to fit specific Subaru WRX STI models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air
The AEM 21-836WR Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Subaru WRX STI models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable textured red powder coated finish. This air intake system was developed to accommodate the engine's factory emissions control devices including the mass air flow sensor. The tapered cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is easy to install with commonly available tools and it is backed by AEM's Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards while others are 50 state legal. View the 21-836WR vehicle applications to determine the legal status for each vehicle.Technical Drawing
Installation Instructions
Installation Instructions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2018 | Subaru | WRX STI | Base |
| 2018 | Subaru | WRX STI | Limited |
| 2018 | Subaru | WRX STI | Type RA |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 415 reviews
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Product Reviews
★★★★★ 1
Do not buy
Cheap, but tastes bad. I guess it worked but I tossed a big bottle of it and got the higher price Spring Valley 10 kg melatonin which works well. The taste is great (strawberry) and highly chewable.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Got it
They are good vitamins. Thank you
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Reviewed in the United States on October 19, 2025
★★★★★ 2
not happy it said gummies that why l bought them
this product said that they were gummy’s but they’re actually chewable tablets. I can’t eat tablets. I’m very disappointed that it said gummy. That’s the only reason why I bought it.
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Reviewed in the United States on March 10, 2026
★★★★★ 4
Not as effective
I don't find the chewable as effective as the ones that dissolve. These don't seem to give me the same relaxing quality.
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Reviewed in the United States on November 30, 2025
★★★★★ 5
A Year’s Supply in One Bottle, But 10mg is Potent
I picked this up mainly for the value factor. Getting 360 tablets in one bottle means I don't have to think about reordering for a very long time, which is convenient.
The "fast dissolve" claim holds up well. You don't need water to take them; they break down quickly in your mouth without leaving a gritty residue. The berry flavor is decent—since it is naturally sweetened, it doesn't have that harsh chemical aftertaste that some sugar-free brands have, though it is slightly chalky compared to a gummy.
The main thing to be aware of is the dosage. 10mg is a heavy dose if you are accustomed to the standard 3mg or 5mg tablets. It definitely works to put you out quickly, but I found that 10mg can be a bit overkill for a standard night. The nice thing about the tablet form (vs. a capsule) is that they are easy to snap in half if you want to taper down to a 5mg dose to avoid feeling groggy the next morning. If you have a high tolerance, this is a great bulk buy, but beginners should probably start with half.
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Reviewed in the United States on December 16, 2025
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