2004.5-2005 GM Duramax 6.6L LLY Helper Springs

For GM 6.6L Duramax LLY builds that see a ton of towing and hauling, chances are you've already noticed the unattractive rear-end sag long before you hit your max payload ratings. Instead of accepting your truck will sag forever, choose a set of premium helper springs to help keep your truck level in even the most aggressive situations. These helper springs are premium towing upgrades designed to help prevent rear-end sag, sway, body roll, and general instability when your truck is loaded down. 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.