2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Air Intakes & Intercoolers

An aftermarket intercooler & piping upgrade may be just what your 2004.5-2005 GM 6.6L Duramax needs to start taking on aggressive driving applications such as towing or off-roading. These premium intercooler upgrades help maximize the power output of any turbocharged engine, giving you a boost in horsepower and torque when pushing things to the limit. Many of these aftermarket components will even accommodate for the increased boost pressure brought on by custom tuning or turbo swap applications, keeping your engine under control during even the most extreme driving situations. Pair your new intercooler ad piping with a new Cold Air Intake or some premium Turbo Upgrades to unlock even more potential hidden under the hood of your Sierra/Silverado. GM Duramax Fitments: 2004, 2005 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.