Intercooler Upgrade Kit For 04-05 6.6L Duramax LLY

Intercooler Upgrade Kit For 04-05 6.6L Duramax LLY

SKU: BP25978   ITEM NO: 141446

Price: $1,459.00

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Intercooler Upgrade Kit

Emissions Compliant: D-161-90


04-05 6.6L Chevrolet Duramax

Less restriction. Flows great. 
The stock intercooler is riddled with restrictions that cause turbulence, which kills airflow and power. Banks minimizes restrictions by making the flow area bigger throughout, from the 3” mandrel-bent boost tubes to the 25% thicker core, which has a whopping  34% increase in flow volume.

Airflow cranks in Banks’ end tanks! 
Most competitors have poorly designed sheet metal end tanks with square corners that choke airflow. Techni-Cooler’s large, high-efficiency custom-machined end tanks have two advantages. One: The streamlined design and rounded corners improve airflow. Two: Banks’ cast end tanks will never melt or burst under high-boost conditions.

The king of cool. 
Removing restrictions and improving airflow lowers boost air temps. This increases the density and oxygen content of air entering the engine, which amplifies power, lowers exhaust gas temps (EGTs) and improves fuel economy. And when EGTs are tamed, the tuner doesn’t need to limit fuel delivery. So you get higher continuous, useable power and more safe power at any EGT. Very cool!

  • Packs cool, dense air into the cylinders
  • Lower restriction for superior flow
  • 25% thicker core with 34 more volume
  • Big boost tubes & durable cast end tanks
  • Cooler EGTs + more MPG & continuous power
  • Improves Power, Durability & Fuel Economy
  • Dramatically increases air density
  • Cooler EGTs, more MPG & constant-duty power
  • High-efficiency custom-machined durable cast end tanks
  • Wide-open inlet and outlet
  • Reduces boost pressure loss
  • Maximizes Boost Air
  • Lowers exhaust gas temps
  • Packs cool, dense air into the cylinders
  • Lower restriction for superior flow
  • 3-inch mandrel-bent boost tubes
  • High-efficiency custom-machined end tanks

Additional information


Manufacturer Part Number



1 Year





Tags air-upgrades-GM-6-6l-lly-04.5-05
Weight 80 lbs
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