2004.5-2005 GM Duramax 6.6L LLY Injector Nozzles

The Injector Nozzles on your 2004.5-2005 GM 6.6L Duramax LLY are typically thought as the "heart" of the engine, so it's important they deliver consistent and reliable performance when you need it most. If you've made any modifications to your rig or your nozzles are simply starting to let you down, choose from our selection of both direct replacements and complete upgrades for an immediate performance upgrade you'll be sure to love! 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.