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Part:   21-8031DC

AEM 21-8031DC Brute Force Intake

AEM Brute Force Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.0
  • 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 21-8031DC Brute Force HD Diesel 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 GMC Sierra 2500/3500 HD and Chevrolet Silverado 2500/3500 HD 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 replacement AEM airbox with a logo embossed aluminum lid which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable black powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor, filter minder and crankcase vent tube. The oval 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. 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 21-8031DC vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Brute Force HD Diesel Cold Air Intake Systems]
Specifications AEM 21-8031DC Product Specifications
Estimated Horsepower Gain13 HP @ 5100 RPM
Air Filter ColorRed
Air Filter Height7 in (178 mm)
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
CARB EO NumberD-670-21
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included3
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Product Box Height15.75 in (400 mm)
Product Box Length24.38 in (619 mm)
Product Box Width17.38 in (441 mm)
Product StyleAEM Brute Force HD Intake
Replacement Filter21-2277DK
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight12.2 lb (5.5 kg)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
Reviews Product Reviews

Ted Lenky from Thompson, Connecticut
November 25, 2014 - Part 21-8031DC
Good power increase especially down low and keeps pulling through the rpm's. Great fit easy, install but not really a noticeable increase in gas mileage. Would definitely recommend to someone else with GM 6.0L.