AEM's Performance Cold Air Intake Systems are designed, tuned and dyno-tested to give your engine more power and acceleration by replacing the restrictive factory air filter, air intake tubing and air box assembly.
The AEM 21-778C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. 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 be in driver-side wheel well which is designed to reduce intake air temperature and increase horsepower. The lower air intake tube is a free-flowing, mandrel-bent aluminum tube with a durable gunmetal gray powder coat finish. The upper air intake tube is a roto-molded, aerodynamically engineered, HDPE tube that insulates the cooler intake air from heat as it passes through the engine bay and into the engine's throttle body. This air intake system was developed to accommodate the Lancer's factory emissions control devices including the mass airflow sensor and PCV 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).
- Precision-tuned and dyno-validated to enhance throttle response, sharpen acceleration, and improve overall engine efficiency, helping maximize horsepower and drivability.
- Creates a deeper, more aggressive induction tone that highlights the intake system’s improved airflow.
- Features low-restriction intake tubing that increases air velocity and high-volume airflow for maximum performance gains.
- Equipped with a long-life, high-capacity air filter capable of up to 100,000 miles before servicing (depending on driving conditions), reducing maintenance while maintaining strong, clean airflow.
- Utilizes washable, reusable, oil-free synthetic filter media that preserves airflow efficiency, traps harmful contaminants, and provides long-term value over disposable filters.
Application Summary:
| Year |
Make/Model |
| 2015-2017 |
Mitsubishi Lancer |
| Attributes |
| Air Box Included |
No |
| Air Filter Color |
Red |
| Air Filter Element Washable |
Yes |
| Air Filter Height |
7 in (178 mm) |
| Air Filter Material |
Non-woven Synthetic |
| Air Filter Oulet Length |
1.250 in. (32mm) |
| Air Filter Oulet Width |
2.750 in. (70mm) |
| Air Filter Outlet Length |
1.25 in (32 mm) |
| Air Filter Outlet Shape |
Round |
| Air Filter Outlet Width |
2.75 in (70 mm) |
| Air Filter Washable |
Yes |
| Alternate Part Number |
AEM-21-778C |
| ASIN |
B018O9NXFW |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| California Restricted |
Not legal for sale or use in California |
| CARB EO Number |
D-670-24 |
| Clamp Color |
Natural |
| Clamp Color/Finish |
Natural |
| Clamp Material |
Stainless Steel |
| Clamp Quantity |
5 |
| Clamp Style |
Regular |
| Clamps Included |
5 |
| Country of Origin (Primary) |
US |
| Coupler Color |
Black |
| Coupler Color/Finish |
Black |
| Couplers Included |
1 |
| Emission Code |
Legal US |
| Estimated Horse Power Gain |
12 HP @ 4900 RPM |
| Estimated Horsepower Gain |
12 HP @ 4900 RPM |
| Filter Color |
Red |
| Filter Material |
Non-woven Synthetic |
| Harmonized Tariff Code (Schedule B) |
8421310000 |
| Hazardous Material Code |
N |
| Horse Power Increase |
12 HP |
| Intake Pipe Color |
Black |
| Intake Pipe Color / Finish |
Black |
| Intake Pipe Inlet Shape |
Round |
| Intake Pipe Material |
High-Density Cross-Linked Polyethylene |
| Intake Pipe Outlet Shape |
Round |
| Intake Pipe Ports |
All intake tube ports needed for the specified applications are included |
| Item Weight |
8.400 lbs. (3.8 kg) |
| Life Cycle Status Code |
Available to Order |
| Mass Air Flow Sensor Adapter Included |
Yes |
| Mass Air Flow Sensor Included |
Mass Air Flow Sensor Adapter Included When Required |
| Mounting Hardware Included |
Yes |
| NAFTA Preference Criterion Code |
B |
| Oil Included |
No, No Filter Oil Required |
| Package Material |
Paperboard |
| Package Type |
Box |
| Product Box Height |
11.630 in. (295mm) |
| Product Box Length |
24.380 in. (619mm) |
| Product Box Width |
12.250 in. (311mm) |
| Product Style |
AEM Cold Air Intake System |
| Replacement Filter |
21-2027DK |
| RPM |
4900 |
| SDR Required Flag |
N |
| Standard Pack |
1 |
| Street Legal In All US States |
Not legal for sale or use in California on any pollution controlled motor vehicle. NOTE: Some specific models and years may be legal in CA. Check the CARB status on your parts at knfilters.com. |
| System Type |
Cold Air Induction |
| TUV Approved (Europe) |
No |
| Warranty |
Limited Lifetime |
| Weight |
8.4 lb (3.8 kg) |
| GTIN |
00024844361653 |
