WCFab 2001-2004 GM LB7 6.6L Duramax 4" Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly...

WCFab 2001-2004 GM LB7 6.6L Duramax 4" Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly...

WCFab 2001-2004 GM LB7 6.6L Duramax 4" Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly...

Replace the fragile plastic OEM fittings on the top of your 2004.5-2010 LLY/LBZ/LMM Duramax engine which are prone to damage with these high quality, black anodized, CNC machined billet aluminum fittings from WCFab. Crankcase Vent (PCV) Fitting Kit Billet 04.5-10 Duramax LLY/LBZ/LMM Black Features:...

L5P Duramax Heavy Duty Engine Swap Mounts for 2001-2010 GM 2500 / 3500 HD Chassis (Chevrolet Silverado and GMC Sierra). Developed specifically to allow the latest generation L5P 6.6L Duramax Diesel engines to be easily bolted into the frame of the earlier generation Chevy...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...

WCFab X Fleece Performance Engineering Thermostat Housing for 2019-2022 6.7L Cummins is a direct replacement upgrade for the unsightly OEM part. This coolant elbow kit features a port with plug to allow you to customize your coolant routings. Comes powder coated in your choice...