Replacement O-Ring for Duramax L5P VGT Turbo Compressor Inlet Flange. Used on the following WCFab Kits: 2017-2024 L5P High Flow Turbo Intake Horn (WCF100775), 2017-2019 L5P Stage 2 Intake Kits (WCF100360), 2020-2024 L5P Stage 2 Intake Kits (WCF100684), 2017-2019 L5P Stage 2 High Flow Bundle Kits (WCF100441), 2017-2019 L5P Stage 3 High Flow Bundle Kits (WCF100403), 2020-2024 L5P Stage 2 High Flow Bundle Kits (WCF100414), 2020-2024 L5P Stage 3 High Flow Bundle Kits (WCF100418), Legacy 2017-2019 L5P Duramax 3.5" Turbo Intake Horn (WCF100721), Legacy 2020-2024 L5P Duramax 3.5" Turbo Intake Horn (WCF100833), Legacy L5P S300 Turbo (WCF100663, WCF100672)