AEM BRUTE FORCE INTAKE SYSTEM For 05-15 Nissan Xterra/Pathfinder/Frontier 4.0L V6 - 21-8504DC

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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.

  • 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

Installation PDF

Installation Instruction Sheet

Dyno Chart - 2005 Nissan Frontier 4.0L - 11.20HP Increase


Estimated Horsepower Gain 11.2 HP @ 5300 RPM
Replacement Filter 21-2109DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Clamps Included 1
Clamp Material Steel
Clamp Style Regular
Couplers Included None
Power Spacer included No
Warranty Limited Lifetime
Product Style AEM Brute Force Intake System
Air Filter Outlet Shape Round
Intake Pipe Color / Finish Gunmetal Gray
Intake Pipe Material Aluminum
CARB EO Number D-670-21
Street Legal In All US States See Vehicle Applications
TUV Approved (Europe) No
Weight 13.6 lb (6.2 kg)
Product Box Height 10.75 in (273 mm)
Product Box Length 35.63 in (905 mm)
Product Box Width 13.25 in (337 mm)
Mounting Hardware Included Yes
Oversize Shipping OS1


Supported Vehicles

2015 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: No

2014 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2014 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2013 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2013 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2012 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2012 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2012 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2011 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2011 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2011 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2010 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2010 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2010 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2009 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2009 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2009 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2008 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2008 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2008 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2007 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2007 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2007 Nissan Xterra 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2006 Nissan Frontier 4.0L V6 Gas

Manual Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2006 Nissan Frontier 4.0L V6 Gas

Auto Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2006 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2006 Nissan Xterra 4.0L V6 Gas

Manual Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2006 Nissan Xterra 4.0L V6 Gas

Auto Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2005 Nissan Frontier 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2005 Nissan Pathfinder 4.0L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2005 Nissan Xterra 4.0L V6 Gas

Manual Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21

2005 Nissan Xterra 4.0L V6 Gas

Auto Trans

Street Legal in All US States: Yes

CARB EO Number:

D-670-21
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