- 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 21-485R 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 red powder coated 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 21-485R vehicle applications to determine the legal status for each vehicle.
AEM 21-485R Product Specifications
| Estimated Horsepower Gain |
8.4 HP @ 7300 RPM |
| Replacement Filter |
21-2109DK |
| Air Filter Color |
Red |
| Air Filter Material |
Non-woven Synthetic |
| Air Filter Outlet Shape |
Round |
| Clamps Included |
9 |
| Clamp Material |
Steel |
| Clamp Style |
Regular |
| Couplers Included |
None |
| Product Style |
AEM Cold Air Intake System |
| Air Filter Height |
8.875 in (225 mm) |
| Intake Pipe Color / Finish |
Red |
| Intake Pipe Material |
Aluminum |
| CARB EO Number |
D-670-21 |
| Street Legal In All US States |
Yes |
| TUV Approved (Europe) |
No |
| Weight |
8.6 lb (3.9 kg) |
| Air Filter Large End Diameter |
6 in (152 mm) |
| Product Box Height |
14.94 in (379 mm) |
| Product Box Length |
22.2 in (564 mm) |
| Product Box Width |
14.5 in (368 mm) |
| Color |
Red |
| Mounting Hardware Included |
Yes |
