AEM 21-698C Cold Air Intake System

✔ Vehicle Fitment — What the AEM 21-698C Fits

Nissan Altima 2.5L (QR25DE):

• 2007 Altima 2.5 / 2.5S

• 2008 Altima 2.5 / 2.5S

• 2009 Altima 2.5 / 2.5S

• 2010 Altima 2.5 / 2.5S

• 2011 Altima 2.5 / 2.5S

• 2012 Altima 2.5 / 2.5S

Fits both sedan and coupe as long as you’ve got the 2.5L.

If you’ve got the V6? Wrong intake.

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.

Why Upgrade Your Altima with the AEM 21-698C?

Because the QR25DE is a willing engine being smothered by a painfully restrictive OEM airbox.

The 21-698C delivers:

• Stronger airflow thanks to mandrel-bent aluminum tubing

• Better throttle response across the rev range

• A deeper, more aggressive intake note

• AEM Dryflow oil-free filter (safe for the MAF, easy to clean)

• Cold-air placement in the fender well for cooler, denser air

• Improved mid-range pull—where the QR25 actually lives

A simple bolt-on that makes the Altima feel noticeably more responsive.

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.

Key Features of the AEM 21-698C Cold Air Intake

🌀 Mandrel-Bent Aluminum Intake Tube

Gunmetal powder-coated and designed for smooth airflow and proper MAF scaling.

🧼 AEM Dryflow Filter

• Oil-free

• Washable

• Reusable

• Excellent filtration + high airflow

Installation Overview

Estimated time: 60–90 minutes

1. Remove OEM airbox + ducting

2. Install AEM brackets and heat shield

3. Route aluminum tube into fender area

4. Mount Dryflow filter

5. Transfer MAF sensor

6. Tighten everything, check clearances

7. Fire it up and enjoy the new sound

Straightforward and clean.

They include a mandrel-bent aluminum intake tube and high quality hardware designed to reduce restriction and reduce intake temperature.

❄ True Cold-Air Routing

Filter sits in the lower fender area, pulling in air far cooler than the engine bay.

🔧 Direct Bolt-On Fitment

Everything mounts cleanly using factory locations. No cutting, no drilling, no zip-tie engineering.

🎧 Better Sound

Expect a throatier growl on acceleration without being obnoxious on the highway.

The design and components of each intake system vary so consult the installation instructions for more information on the contents of each part number.

Daily-Driver Friendly

• Works with factory ECU, no tune required

• Low-maintenance, oil-free filter

• No extra cabin noise or drone

• Designed for long-term reliability

• Makes the car more fun without making it annoying

Perfect for commuters, enthusiasts, or anyone sick of the stock intake’s suffocation.

This Air Intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.