AEM Brute Force Intake System

04 - 05 6.6L Chevrolet Silverado | GMC Sierra

by AEM
SKU NWD-21-8017DC

21-8017DC | 21-8017DP

  • 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
  • Features
  • Videos
  • Instructions
  • Vehicle Fitment

he AEM 21-8017DC 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 GMA Sierra 2500 HD/3500 and Chevrolet 2500 HD/3500 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 air filter restriction gauge.

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.


Replacement Filter: 21-2049DK

Air Filter Color: Red

Air Filter Material: Non-woven Synthetic

Air Filter Outlet Shape: Round

Clamps Included: 3

Clamp Material: Steel

Clamp Style: Regular

Couplers Included: None

Product Style: AEM Brute Force Intake

Air Filter Height: 8.938 in (227 mm)

Air Filter Outlet ShapeRound

Intake Pipe Color / Finish: Gunmetal Gray or Polished

Intake Pipe Material: Aluminum

CARB EO Number: D-670-15

Street Legal In All US States: Yes

TUV Approved (Europe): No

Weight: 10.3 lb (4.7 kg)

Air Filter Large End Diameter6 in (152 mm)

Product Box Height: 12.75 in (324 mm)

Product Box Length: 24.5 in (622 mm)

Product Box Width: 20.5 in (521 mm)

Mounting Hardware Included: Yes



CHEVROLET Silverado 2500 HD

CHEVROLET Silverado 3500



GMC Sierra 2500 HD

GMC Sierra 3500


Make note that not all 2004 model year vehicles are equipped with the LLY engine type. 21-8017 will only fit 2004 model year vehicles with LLY engine types. 2004 model year vehicles with the LLY engine type can be identified by VIN number. The 8th number of the VIN will be “2” on 2004 model year vehicles with the LLY engine type.