Wehrli WCF100420-GB Thermostat Housing & Coolant Pipe Gloss Black 2006-2010 LBZ

Vehicle Fitment

• 2006-2007 Chevrolet Silverado 2500HD (6.6L Duramax LBZ, 4WD/2WD - All Trims)
• 2006-2007 Chevrolet Silverado 3500/3500HD (6.6L Duramax LBZ, 4WD/2WD - All Trims)
• 2007.5-2010 Chevrolet Silverado 2500HD (6.6L Duramax LMM, 4WD/2WD - All Trims)
• 2007.5-2010 Chevrolet Silverado 3500/3500HD (6.6L Duramax LMM, 4WD/2WD - All Trims)
• 2007.5-2010 GMC Sierra 2500HD (6.6L Duramax LMM, 4WD/2WD - All Trims)
• 2007.5-2010 GMC Sierra 3500/3500HD (6.6L Duramax LMM, 4WD/2WD - All Trims)

Fitment Notes

• NOT compatible with 2006-2007 GMC Sierra. Chevrolet applications only for the 2006-2007 model year.
• For trucks equipped with a WCFab Dual CP3 kit or a dual alternator setup, use kit WCF100424 instead.
• Compatible with factory VGT style turbochargers. Required for race cover style or SXE turbochargers being mounted in the valley.
• Replaces GM OEM Part Numbers: 19330105, 15792824, 25833204, 97361881.
• This listing is for the Gloss Black (-GB) powder coat color option.

Features

• Replaces the OEM upper radiator hose that crosses over the driver side valve cover and the factory coolant return pipe with a clean, hard-pipe aluminum routing.
• Top outlet design routes coolant upward and forward from the thermostat, improving access to driver-side fuel system components and simplifying underhood service.
• Creates additional room for larger aftermarket turbochargers and supporting components in the engine bay.
• Required upgrade for race cover style or SXE turbocharger installations mounted in the valley.
• CNC machined billet aluminum thermostat upper housing for superior precision, durability, and appearance over the OEM unit.
• Includes all hardware for a complete bolt-on installation - coolant pipe, silicone boots, and T-bolt clamps included.
• Finished in Gloss Black powder coat for a clean, aggressive underhood appearance.
• Made in the USA by Wehrli Custom Fabrication.

Specifications

• Part Number: WCF100420-GB
• Color/Finish: Gloss Black Powder Coat
• Thermostat Housing Material: CNC machined billet aluminum
• Coolant Pipe Material: Fabricated aluminum
• Replaces GM OEM Part Numbers: 19330105, 15792824, 25833204, 97361881
• Hardware: Silicone boots and T-bolt clamps included
• Package Weight: 5.0 lbs
• Package Dimensions: 30.0" L x 10.0" W x 10.0" H
• Country of Origin: USA

Included Components

• 1x CNC machined billet aluminum thermostat upper housing (Gloss Black powder coated)
• 1x Fabricated aluminum upper coolant pipe (Gloss Black powder coated)
• Silicone boots
• T-bolt clamps

Product Description

The Wehrli WCF100420-GB is a Top Outlet Billet Thermostat Housing and Upper Coolant Pipe Kit for 2006-2010 LBZ and LMM 6.6L Duramax trucks. It replaces the factory upper radiator hose that routes across the driver side valve cover and the OEM coolant return pipe with a fabricated aluminum hard-pipe system that exits upward and forward from the thermostat. The result is cleaner coolant routing, improved access to driver-side fuel system components, and critical clearance for larger aftermarket turbochargers - including race cover style and SXE turbos mounted in the valley.

The billet aluminum thermostat housing is CNC machined for precision fit and a premium appearance, and the kit ships complete with the coolant pipe, silicone boots, and T-bolt clamps for a straightforward bolt-on installation. Note: 2006-2007 GMC Sierra trucks are not compatible with this kit - see WCF100424 for dual CP3 or dual alternator applications. Finished in Gloss Black powder coat and made in the USA by Wehrli Custom Fabrication.