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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.
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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.
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- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
First mido
Color: Black on Stainless Steel
Great feel and size
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Reviewed in the United States on November 26, 2025
★★★★★ 5
Perfect overall watch
Color: Blue on Stainless Steel
Excellent watch overall
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Reviewed in the United States on July 22, 2025
★★★★★ 1
Quality is not good like already wore. Missing warranty card
Color: Green on Brown Leather
Worst quality the tag is broken and the warranty card not there and no user manual box is also not that good. It came like someone used it and sell the watch
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Swiss Made Automatic Titanium Dive Watch for around 1K
Color: Black on Titanium, Color: Black on Titanium
Solidly built, movement is quite accurate. Dial, power reserve and “adjust on the fly” style clasp are highlights. Owned for 2 years now. Mido is owned by Swatch group so obtaining service is easy in most countries.
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Reviewed in the United States on September 28, 2024
★★★★★ 5
Two thumbs up
Fit Type: 9" Inseam, Size: XX-Large, Color: Rust
Great shorts. Comfortable. Size as expected. Holding up well.
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Reviewed in the United States on June 1, 2026