The DmaxStore Billet Heater Hose Connector is a direct replacement for your 2001-2014 Silverado Sierra 2500HD 3500HD 6.6L LB7, LLY, LBZ, LMM, LML and 2020-2024 L5P Duramax Diesel. The plastic OE heater hose connectors are a common failure point when the older part fatigues from heat and vibration. With our billet heater hose connector you won't have to worry about your plastic connector cracking, becoming brittle, or leaking. It also features an improved x-ring style seal that has 2 contact points to prevent any leaks. Includes: 1- Billet Heater Hose Connector 1- Retainer Clip