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Part:   21-485P

AEM 21-485P 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 21-485P fits some Mazda RX-8 models. See vehicle applications for details.
The AEM 21-485P 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 Mazda RX-8 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 above the passenger side wheel well which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable chrome-like finish with a series of gradually expanding inlet pipes. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor and breather hoses. The tapered cone 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 21-485P vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-485P Product Specifications
Estimated Horsepower Gain8.4 HP @ 7300 RPM
Air Filter ColorRed
Air Filter Height8.875 in (225 mm)
Air Filter Large End Diameter6 in (152 mm)
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
CARB EO NumberD-670-21
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included9
ColorPolished
Intake Pipe Color / FinishPolished
Intake Pipe MaterialAluminum
Product Box Height14.94 in (379 mm)
Product Box Length22.2 in (564 mm)
Product Box Width14.5 in (368 mm)
Product StyleAEM Cold Air Intake System
Replacement Filter21-2109DK
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight8.6 lb (3.9 kg)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
Reviews Product Reviews

Stephen Gilbert from Mountain View, California
November 14, 2016 - Part 21-485P
2010 Mazda RX-8 GT Automatic. After installing the AEM CAI, it made the car: 1.) Sound much more throtier, especially within the 3-7k RPM. 2.) Feel more responsive, it's really noticeable when accelerating from 0-35. 3.) Seem to get less MPG by nearly 5-10 miles per tank. Overall, I really like the look and sound. It's easy to install and even saves weight. Unlike most CAI's, AEM has been dynoed with great results. I would most definitely do this installation again.