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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.Installation Instructions
Installation Instructions
Technical Drawing
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- 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.
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4.4 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Fantastic toy
Format: Board book
Such a perfect book for little train lovers. I don’t see any issues with it. My 3 year old son loves to read it every night. The train doesn’t really come off the track, but if I’m holding the book on my lap, I’ll move the book around to help it slide along. It’s bigger than I expected from the pictures, but that was definitely a good thing. So happy with this purchase.
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Reviewed in the United States on January 21, 2026
★★★★★ 5
Great gift
Format: Board book
Kids love it
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Reviewed in the United States on May 30, 2026
★★★★★ 5
GREAT toy book
Format: Board book, Format: Board book
GREAT gift for my 4 year old who loves trains. He got a lot of gifts for Christmas but this one is probably his favorite. It is also easy to take with you if you travel. Fun, entertaining and educational with facts about famous trains. Definitely recommend it!
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Reviewed in the United States on December 26, 2025
★★★★★ 1
Poor quality
Format: Board book, Format: Board book
So bummed . Love these books. Put up for Christmas and the binder of the book is completely torn. Didn’t see till I wrapped.
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Reviewed in the United States on December 12, 2025
★★★★★ 5
A must read addition to the Slaughterverse.
Format: Paperback
The Book of Slaughter reveals the secret history of the Slaughterverse while giving you a glimpse of horrors yet to come. The story follows Maxine Slaughter as she leaves behind her white mask in order to restart the House of Slaughter's Black Masks. As she studies and trains for this task, she uncovers the forgotten lore of the Order of St. George and a plot that will shape its future.
Volume 2 contains information on the Order of St. George's mask factions.
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Reviewed in the United States on June 27, 2025