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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.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.
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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
4.6 ★★★★★
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Product Reviews
★★★★★ 4
Great wire
Size: 14/2 AWG-200 FT, Color: White
It was put forward just the way it is great speaker wire
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Reviewed in the United States on March 14, 2026
★★★★★ 5
Speaker wire
Size: 14/2 AWG-200 FT, Color: White
Always my go to wire. And great price
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Great in wall wire, easy to install
Size: 14/2 AWG-200 FT, Color: White
Ran this through studs for an in-wall 5.2 system, worked great, very easy to fish, wire threaded nicely, good copper, good connections. Easy to bend for 14 AWG.
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Reviewed in the United States on November 26, 2025
★★★★★ 5
Good enough
Size: 14/2 AWG-200 FT, Color: White
It works
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Good product
Size: 50 Feet, Style: 10 AWG
Works good, a little lite to run at distance without dropping a little
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Reviewed in the United States on April 26, 2026