The AEM 21-491C 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 6 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 relocated to the driver-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 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 crankcase breather 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 21-491C vehicle applications to determine the legal status for each vehicle.
- 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
Installation PDF
Installation Instruction Sheet
| Replacement Filter | 21-202DK |
| Air Filter Color | Red |
| Air Filter Material | Non-woven Synthetic |
| Air Filter Outlet Shape | Round |
| Clamps Included | 3 |
| Clamp Material | Steel |
| Clamp Style | Regular |
| Couplers Included | None |
| Product Style | AEM Cold Air Intake System |
| Intake Pipe Color / Finish | Gunmetal Gray |
| Intake Pipe Material | Aluminum |
| CARB EO Number | D-670-15 |
| Street Legal In All US States | Yes |
| TUV Approved (Europe) | No |
| Weight | 5.8 lb (2.6 kg) |
| Product Box Height | 11.6 in (295 mm) |
| Product Box Length | 24.38 in (619 mm) |
| Product Box Width | 12.2 in (310 mm) |
| Mounting Hardware Included | Yes |
| Warranty | Limited Lifetime |
| 2008 Mazda 6 2.3L L4 Gas Except LEV2 SULEV 8TKXV02.3NH2 Street Legal in All US States: Yes CARB EO Number: D-670-15 |
| 2007 Mazda 6 2.3L L4 Gas Except LEV2 SULEV 7TKXV02.3NH1 Street Legal in All US States: Yes CARB EO Number: D-670-15 |
| 2006 Mazda 6 2.3L L4 Gas Except LEV2 SULEV 6TKXV02.3NG2 Street Legal in All US States: Yes CARB EO Number: D-670-15 |
| 2005 Mazda 6 2.3L L4 Gas Except LEV2 SULEV 5TKXV02.3NG1 Street Legal in All US States: Yes CARB EO Number: D-670-15 |