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Part:   21-776C

AEM 21-776C 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
  • Easy to install using commonly available tools
  • 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 21-776C fits some Scion iM, Toyota Corolla, and Toyota Corolla iM models. See vehicle applications for details.
The AEM 21-776C 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 iM 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 location and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The air intake tube 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 factory mass airflow sensor and vent 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 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 21-776C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-776C Product Specifications
Estimated Horsepower Gain5 HP @ 5700 RPM
Replacement Filter21-201DK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included3
Clamp MaterialStainless Steel
Clamp StyleRegular
Couplers Included1
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
Weight8.6 lb (3.9 kg)
Product Box Height12.25 in (311 mm)
Product Box Length20.25 in (514 mm)
Product Box Width12.25 in (311 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

Thomas Stevens from Boise, Idaho
February 24, 2018 - Part 21-776C
Amazing intake, sound is pretty stock up to about 3000, then you can really hear the difference (and it sounds great) noticeable increase to power, had to restrain myself from going all out when I tested it. Only took me and a friend about an hour and a half (in the middle of a cold snowy day) a more experienced person could easily do this on their own in an hour. If you want one upgrade to make your iM into the hot hatch it deserves to be this is the one.
Ben Welch from DesMoines, Iowa
September 20, 2017 - Part 21-776C
The sound this thing makes, just the glorious sound alone, is worth the price. The directions were very easy to follow, even came with a list of the tools needed to do the install. At least on mine it called for a 4mm hex key, when it was a 3mm. It vastly improved the off line throttle response of my IM, with smaller gains in the mid and high range. Fuel economy went up just a bit, but with the epic sound of this kit, you might lean on it a bit harder then you think you would, erasing any fuel economy gains. Great kit, fast shipping, excellent quality, epic sound, better fuel economy and better throttle response. At about 90 minutes for a novice to do the install, won't even take an afternoon.