AEM BRUTE FORCE INTAKE SYSTEM For 99-04 Toyota 4Runner / Tacoma 3.4L - 21-8402DC

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The AEM 21-8402DC 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 Toyota Tacoma and 4Runner 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 vacuum hoses. 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 21-8402DC 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


Replacement Filter 21-202DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Clamps Included 4
Clamp Material Steel
Clamp Style Regular
Couplers Included 1
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-670-15
Street Legal In All US States Yes
TUV Approved (Europe) No
Weight 9.2 lb (4.2 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


Supported Vehicles

2004 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2003 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2002 Toyota 4Runner 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2002 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2001 Toyota 4Runner 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2001 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2000 Toyota 4Runner 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

2000 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

1999 Toyota 4Runner 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

1999 Toyota Tacoma 3.4L V6 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-15

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