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6L Duramax LMM - Up To 82 HP & 117
Do not use in gasoline engines equipped with catalysts
which directly contributes to extended transmission life
we've taken convenience and compatibility to the next level by utilizing the factory ram air duct
Hellwig Medium-Duty EZ-990 Helper Spring Kit For 1966-2000 Dodge/Chevy/GMC/Ford 1988-2003 XLH1200 Sportster 6L Duramax LMM - UpHellwig's medium duty EZ 990 Helper Springs pack a lot of capability in every box. Packaged complete with the same heavy duty powder coated and plated components, hardware and installation instructions as our heavy duty helper spring products, these kits are designed for the vehicles that need lighter assistance in carrying a load. Simple bolt on design using common hand tools provide the installer ease of installation and the vehicle owner hassle
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