The Industrial Injection 422408 Add-A-Turbo Kit provides the perfect balance of increased power while maintaining excellent towing performance in your 2001-2004 GM 6.6L Duramax LB7 truck. This turbo kit utilizes your current stock turbo and compounds it with a Borg Warner S475. With added fuel modifications to your Duramax, you will need to increase airflow to match and this kit will meet that demand! Industrial includes everything needed for installation. Capable of 650-700 horsepower.