AEM 21-884C Cold Air Intake for 2021-2025 Mazda 3 2.5L

Vehicle Fitment

• 2021-2025 Mazda 3 (2.5L L4 gasoline: Turbo, Turbo Premium Plus, Carbon Turbo trims)

Features

• Performance cold air intake system engineered and dyno-tested for Mazda 3 2.5L
• Enhances airflow compared to restrictive factory intake
• Includes oversized AEM Dryflow™ synthetic washable air filter - oil-free design
• Dryflow media can last up to ~100,000 miles before cleaning is needed
• Mandrel-bent aluminum intake tube with durable gunmetal gray powder-coat finish
• Custom shaped heat shield with lid reduces intake air temperatures
• Improves throttle response, engine efficiency, and sound character
• Backed by AEM lifetime limited manufacturer warranty

Specifications

• Part number: AEM 21-884C
• Application: Cold air intake system
• Fitment years: 2021-2025
• Vehicle: Mazda 3
• Engine: 2.5 L inline-4 gasoline (Turbo variants)
• Estimated horsepower gain: ~6.76 HP @ ~4524 RPM
• Air filter material: Dryflow™ synthetic washable & reusable
• Air filter color: red
• Intake tube material: mandrel-bent aluminum, gunmetal gray
• Replacement filter: AEM 21-2110DK
• Clamps included: 3 stainless steel worm-gear clamps
• Couplers included: 1
• Legal status: not legal for sale or use in California on pollution-controlled vehicles
• Warranty: limited lifetime

Included Components

• 1x AEM Dryflow™ synthetic washable air filter
• 1x Mandrel-bent aluminum intake tube (gunmetal gray)
• 1x Custom shaped heat shield with lid
• 3x Stainless steel worm-gear clamps
• 1x Intake coupler
• Mounting hardware kit
• Installation instructions

Product Description

The AEM 21-884C Cold Air Intake System is a performance-oriented replacement intake designed specifically for **2021-2025 Mazda 3 vehicles** equipped with the 2.5 L gasoline engine in Turbo, Turbo Premium Plus, and Carbon Turbo trims. By replacing the restrictive factory intake path with a high-flow mandrel-bent aluminum tube and oversized AEM Dryflow™ synthetic washable air filter, this system increases airflow into the engine for improved throttle response, better combustion efficiency, and enhanced engine character.

Featuring an oil-free Dryflow™ filter that can be used for up to approximately **100,000 miles before cleaning is needed**, the 21-884C simplifies maintenance and provides long-life airflow performance. The included heat shield with lid helps reduce intake air temperatures by shielding the filter from hot engine bay air, delivering cooler, denser air for more efficient combustion. With an estimated gain of around **~6.76 HP** over the stock intake setup, this intake is a solid performance upgrade for Mazda 3 enthusiasts. Always verify local emissions compliance, as this intake **is not legal for sale or use in California or other CARB-restricted states** on pollution-controlled vehicles unless otherwise certified.