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Part:   21-8504DC

AEM 21-8504DC Brute Force Intake

AEM Brute Force Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7
  • Increased horsepower
  • Tuned and dyno-tested to improve acceleration and engine sound
  • Low restriction aluminum tubing
  • Easy to install using commonly available tools
  • 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 21-8504DC fits some Nissan Frontier, Nissan Pathfinder, and Nissan Xterra models. See vehicle applications for details.
The AEM 21-8504DC Brute Force Air Intake System produces horsepower and torque gains by replacing the vehicle’s restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Nissan Frontier, Xterra and Pathfinder models. Air enters the system through an extra large AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor and crank case vent 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). The air intake system is easy to install with commonly available tools and it 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 21-8504DC vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Brute Force Truck Cold Air Intake Systems]
Specifications AEM 21-8504DC Product Specifications
Estimated Horsepower Gain11.2 HP @ 5300 RPM
Replacement Filter21-2109DK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Clamps Included1
Clamp MaterialSteel
Clamp StyleRegular
Couplers IncludedNone
Power Spacer includedNo
WarrantyLimited Lifetime
Product StyleAEM Brute Force Intake System
Air Filter Height8.875 in (225 mm)
Air Filter Outlet ShapeRound
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
CARB EO NumberD-670-21
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Weight13.6 lb (6.2 kg)
Air Filter Large End Diameter6 in (152 mm)
Product Box Height10.75 in (273 mm)
Product Box Length35.63 in (905 mm)
Product Box Width13.25 in (337 mm)
Mounting Hardware IncludedYes
Oversize ShippingOS1

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive
Reviews Product Reviews

IMac from Anchorage, Alaska
November 6, 2016 - Part 21-8504DC
Installed fast and simple. (adhesive back clip for tranny breather let go after 2 days). Sounds normal while cruising, loud when stomping on the throttle. Worth it.
Steven Bowley from Lakeville, MN
April 14, 2015 - Part 21-8504DC
Took a little under an hour to install. Very quick and very easy. Great look compared to the stock intake and other CAI designed for the truck. Has an aggressive sound when turning the truck on and when getting on a highway, you can really hear it roar. I would easily buy this again over other brands such as [BRAND NAME] and [BRAND NAME].
SilverSurfer from Maui, Hawaii
August 8, 2014 - Part 21-8504DC
Very easy to install. Well built and awesome looking! Quiet while cruising and lots of Wooot! on demand. The dry filter means no more worries about my MAF Sensor.