iFJF 1R-0750 Fuel Filter Aluminum Adapter Refit Head for Duramax 6.6L 2001-2016 Chevy Silverado/GMC Sierra 2500 3500 Catepillar Fuel Filter LB7/LLY/LBZ/LMM/LML Diesel Engine

Fits: Chevy/GMC Duramax LB7/LLY/LBZ/LMM/LML 2001-2017 We provide 3 O'rings. Black anodized surface to prevent from corrosion,make it a longer lifetime. Improve the efficiency and work life of the system while use this filter adapter to replace the original one on the Cat. Outer diameter measurement of O'rings: 98*3.5 32*5.2 31*3.5 The durable anodized filter adapter threads on to the OEM Filter Head and allows you run the more efficient and less expensive CAT filter on your truck. To know how to install,please read instructions in the package,and any questions,please e-mail us.