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04.5-05 LLY Duramax was GM's second iteration of a common rail Diesel engine. It was a moderate upgrade from the LB7 in horsepower figures with a 10hp bump to 310hp and the same torque figure of 520 Lb/Ft. The addition of a Variable Geometry Turbo, EGR and Catalytic Converter, the Duramax was able to perform like an LB7, but meet new governmental emission standards. Deviant has built several parts to compliment the LLY platform of GM Trucks, including the first billet resonator plug, transmission repair lines, crank pully pin kit, single hole billet fuel sumps, replacement power steering lines and other add on accessories.
