Wehrli WCF100466-GB 3.5" Intercooler Outlet Elbow Kit for 06-10 GM 6.6L Dura

Vehicle Fitment

• 2006-2010 GM 6.6L Duramax LBZ/LMM (Chevrolet Silverado 2500HD/3500HD & GMC Sierra 2500HD/3500HD)

Features

• 3.5" high-flow intercooler outlet elbow replaces restrictive factory plastic section
• CNC-machined billet aluminum flange with double O-rings for superior sealing
• Upgraded heavy-duty silicone reducer boot (3.5" to 3")
• New wire clip ring for secure intercooler flange connection
• Stainless steel T-bolt clamps for durability and secure fit
• Eliminates boost leaks common with factory outlet piece
• Powder-coated gloss black finish for corrosion resistance
• Designed for high-boost and high-flow applications

Specifications

• Part Number: WCF100466-GB
• Intercooler Outlet Diameter: 3.5" (89 mm)
• Reducer Boot: 3.5" to 3"
• Material: 14 ga aluminum
• Finish: Gloss black powder coat
• Seal: Double O-ring CNC flange
• Clamps: Stainless steel T-bolt
• Orientation: Passenger side outlet elbow

Included Components

• 1x 3.5" intercooler outlet elbow
• 1x 3.5" to 3" silicone reducer boot
• 2x stainless steel T-bolt clamps
• Double O-rings and new wire clip ring

Product Description

The Wehrli WCF100466-GB Intercooler Outlet Elbow Kit is a performance-focused upgrade for 2006-2010 GM 6.6L Duramax LBZ/LMM diesel trucks. This gloss black finished elbow replaces the factory plastic outlet section with a robust 3.5" aluminum piece that can handle higher boost pressures and improve airflow reliability. Its CNC-machined flange with double O-rings and upgraded wire clip ring provide a tighter seal at the intercooler connection, reducing common boost leak points inherent in stock plumbing. :contentReference[oaicite:0]{index=0}

Built for use with high-flow intercooler piping, turbo kits, or upgraded setups, the kit includes a heavy-duty silicone reducer boot and stainless steel T-bolt clamps for secure connections. The 3.5" design enhances airflow capability over the factory plastic piece and helps maintain consistent boost and performance under demanding conditions. This elbow is ideal for Duramax owners looking to improve durability and efficiency in their intercooler system.

Note: This kit is not designed to be compatible with the OEM passenger/cold side intercooler pipe and is intended for use with aftermarket plumbing or turbo upgrades. Not legal for sale in California or states requiring CARB compliance.