- 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 21-735WB fits some Subaru Impreza WRX STi, Subaru WRX, and Subaru WRX STI models.
AEM Cold Air Intake Systems are designed to produce horsepower and torque gains. They replace the restrictive factory airbox and air filter to give you better performance and better engine sound. AEM cold air intakes relocate the air filter outside the engine compartment so cooler air can be fed into your engine. Cooler air carries more oxygen, which translates into a more intense explosion in the combustion chamber for more horsepower and torque. AEM Cold Air Intakes include an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration, and performance while allowing easy oil-free cleaning. They include a mandrel-bent aluminum intake tube and high quality hardware designed to reduce restriction and reduce intake temperature. The design and components of each intake system vary so consult the installation instructions for more information on the contents of each part number.
AEM 21-735WB Product Specifications
| Estimated Horsepower Gain |
32 HP @ 5400 RPM |
| Replacement Filter |
21-2029D |
| 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 |
None |
| Product Style |
AEM Cold Air Intake System |
| Air Filter Height |
9 in (229 mm) |
| Intake Pipe Color / Finish |
Wrinkle Black |
| Intake Pipe Material |
Aluminum |
| CARB EO Number |
D-670-24 |
| Street Legal In All US States |
See Application Link Above |
| TUV Approved (Europe) |
No |
| Weight |
8.9 lb (4 kg) |
| Product Box Height |
12.25 in (311 mm) |
| Product Box Length |
20.25 in (514 mm) |
| Product Box Width |
12.25 in (311 mm) |
| Mounting Hardware Included |
Yes |
