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USD 416.99 416.99 422.99
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AEM 21-9021D Brute Force HD Intake

2001-2004 GM 6.6L Duramax LB7
Part #:
FROM 416.99
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Take your 2001-2004 GM 6.6L Duramax LB7 and upgrade its underwhelming factory intake system with the the AEM 21-9021D Brute Force HD Intake. The Brute Force Intake is easy to install and clean due to it's synthetic oil free filter media. In order to keep the air cool and increase horsepower, the air filter is housed in the original air box space and is surrounded by a heat shield. The intake tubing is designed with durable aluminum that is powder coated in a gunmetal gray finish for an awesome look. 

  • Increased Horsepower
  • Easy to Install Using Commonly Available Tools
  • Tuned and Dyno-Tested to Improve Acceleration and Engine Sound

Product Options

21-9021DP Polished Finish
21-9021DC Silver Powder Coat Finish


  • Manufacturer Name AEM
  • Shipping Weight 15.00 lb.
  • Shipping Length 15 in.
  • Shipping Width 22 in.
  • Shipping Height 15 in.
  • EO Number D-670-15
  • Warranty Yes
  • Warranty Info 1 Year Limited
  • Prop 65 WARNING: Cancer & Reproductive Harm -


Duramax Enthusiast
Location: Hydro, OK
Great intake! Install was very simple. Dropped my engine temp and EGTS, Also Turbo whistle and spool up increased from stock air box. Recommend AEM to anyone.
AEM Brute Force HD... excellent
Location: Irvine
so far i've had this for 2 years now and no complaints. it's been all the way to oregon (coos bay) to glamis. so it's seen its fair share of sand/dust. it's installed on my dmax lb7 and i love how the turbo whistles compared to stock intake. haven't notice any increase/decrease in egt's as i got it installed w/ my guages.
AEM21-9021D Review
Location: Unknown
Great product, easy installation. Took me 30 mins. On my Chevy diesel i received about 20.2 miles per gallon on highway. On just the intake installed. I can also feel the more torque. it gets off the line quicker. better response time. For the city im sitting about 17.6 mpg but I've been a little heavy on the pedal.

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Most Popular Questions

Does this product come with the mass air flow sensor inlet?
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