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AEM-21-815C AEM Cold Air Intake System
$399.99
In stock
SKU
AEM-21-815C
The 21-815C Performance Cold Air Intake System produces horsepower and torque gains by replacing the restrictive air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Audi A4 models. The cone shaped AEM Dryflow air filter is made of a synthetic media which requires no oil and can be used up to 100,000 miles before cleaning (depending on driving conditions). The two piece heat shield keeps hot engine air from entering the air intake system and directs cooler air using the factory inlet scoop. It has been designed to have more air capacity than the factory unit for better air flow. A clear AEM logo also doubles as a window to monitor if the filter needs servicing. The factory vacuum tube mounts directly on the intake tube. 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 21-815C vehicle applications to determine the legal status for each vehicle.
- Increased horsepower
- Tuned and dyno-tested to improve acceleration and engine sound
- Clear AEM logo also acts as a filter monitor
- 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
| Estimated Horsepower Gain | 11 HP @ 3300 RPM |
| Replacement Filter | 21-209DK |
| Air Filter Color | Red |
| Air Filter Material | Non-woven Synthetic |
| Air Filter Outlet Shape | Round |
| Clamps Included | 3 |
| Clamp Material | Stainless Steel |
| Clamp Style | Regular |
| Couplers Included | 1 |
| Product Style | AEM Cold Air Intake System |
| Intake Pipe Color / Finish | Black |
| Intake Pipe Material | High-Density Cross-Linked Polyethylene |
| Street Legal In All US States | No |
| TUV Approved (Europe) | No |
| Weight | 13 lb (5.9 kg) |
| Product Box Height | 11.63 in (295 mm) |
| Product Box Length | 24.38 in (619 mm) |
| Product Box Width | 12.25 in (311 mm) |
| California Restricted | Not legal for sale or use in California |
| Mounting Hardware Included | Yes |
| Warranty | Limited Lifetime |
No cross references found for this part
DIY Level
Easy Moderate Advanced
Tools Needed
Wrench, Extension, Flat Blade Screwdriver, Allen Wrench
Installation Time
90 Minutes
Resources:
Installation PDF
Installation Instruction Sheet Dyno Chart - 2017 Audi A4 2.0L - 11HP IncreaseAEM Products
Engineered to outperform
Air Intake Systems
Custom-engineered tubes deliver better airflow than you get with a stock intake. More air means better performance.
Air Filters
Using cotton gauze instead of typical folded paper, our filters increase airflow while providing excellent engine protection.
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