Wehrli Custom Fab Stage 2 High Flow Bundle Kit for 2020-2025 Chevrolet/GMC 2500/3500 (L5P Duramax) - WCFab Grey

Fits 2020-2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD (6.6L L5P Duramax).

The Wehrli Custom Fabrication (WCFab) Stage 2 High Flow Bundle Kit provides a complete overhaul of your L5P Duramax's induction and charge air system. This kit replaces the restrictive, multi-piece factory components with high-flow, 14-gauge mandrel-bent aluminum tubing. By upgrading the intake and intercooler piping, you eliminate common failure points such as the leak-prone plastic passenger-side cold pipe and the restrictive resonator-equipped driver-side hot pipe.

The included 4-inch intake features a high-flow turbo inlet horn and a sealed air box with a removable lid for easy inspection. For the intercooler side, WCFab upgrades the hot side to 3 inches and the cold side to 3.5 inches, utilizing CNC-machined flanges with double O-rings to ensure a leak-free seal under high boost pressures. Finished in a durable WCFab Grey powder coat, this kit is a complete bolt-on solution that requires no aftermarket tuning.

• 4 in. Aluminum intake pipe with sealed air box enclosure and dry filter
• Outerwears hydrophobic pre-filter cover included to protect the MAF sensor and turbo
• 4 in. Intake horn with PCV port and Surge Ring
• 3 in. Mandrel-bent hot side intercooler pipe (replaces 2.5 in. factory unit)
• 3.5 in. Mandrel-bent cold side intercooler pipe (replaces plastic/rubber factory unit)
• CNC machined flanges with double O-rings for superior sealing
• Heavy-duty 14-gauge aluminum construction with silicone boots and stainless steel T-bolt clamps
• Custom WCFab Grey powder coat finish
• No tuning required; retains factory connection points and sensors
• Manufacturer Part Number: WCF100414-GRY