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Part:   21-725C

AEM 21-725C Cold Air Intake

AEM Cold Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0
  • Increased horsepower
  • Tuned and dyno-tested to improve acceleration and engine sound
  • Low restriction aluminum tubing
  • Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions)
  • Washable and reusable oil-free filter media
  • AEM Lifetime Limited Warranty

The AEM 21-725C fits some Scion tC models. See vehicle applications for details.
The AEM 21-725C 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 Scion TC 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 which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor and valve cover hose. 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 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 21-725C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-725C Product Specifications
Estimated Horsepower Gain7.67 HP @ 6200 RPM
Replacement Filter21-203DK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included5
Clamp MaterialStainless Steel
Clamp StyleRegular
Couplers IncludedNone
Product StyleAEM Cold Air Intake System
Air Filter Height5.125 in (130 mm)
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
Street Legal In All US States No
TUV Approved (Europe)No
Weight9.5 lb (4.3 kg)
Product Box Height10.6 in (269 mm)
Product Box Length35.4 in (899 mm)
Product Box Width13.3 in (338 mm)
California RestrictedNot legal for sale or use in California
Mounting Hardware IncludedYes
WarrantyLimited Lifetime

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive
Reviews Product Reviews

Auburn Thompson from Ararat, North Carolina
September 18, 2017 - Part 21-725C
Wow! Just wow, that's all I can say.. Amazing product and performance. It took me about an 1 1/2 hours to install and that was taking my time, making sure everything fit. As for the performance... just amazing. The car is SO much louder. Not in a ricer way, it actually sounds deeper. But one thing I've noticed is that the boost in MPG is really hard to get. If you gun it once you've pretty much lost that boost. But all in all, it's an amazing buy.
Taylor Steensma from Redmond, California
March 22, 2017 - Part 21-725C
This cold air intake is an aweaome product. No problems at all. Great sound and high end power increase. Love it everyday I drive my car. AEM makes a great product.
Corey from Vermont
May 31, 2016 - Part 21-725C
Best intake I've ever purchased. Perfect fit and no CEL lights.