Wehrli Stage 3 High Flow Bundle Kit for 2020-2025 Chevrolet/GMC 2500HD/3500HD (L5P Duramax) - Gloss White - WCF100418-GW

Fits select 2020-2025 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD models equipped with the 6.6L L5P Duramax engine.

The Wehrli Custom Fab (WCFab) Stage 3 High Flow Bundle is a comprehensive solution to the airflow and reliability bottlenecks found in the factory L5P Duramax air track. This kit replaces the restrictive OEM resonator and prone-to-fail middle boot joints with heavy-duty components designed for high-boost environments and improved thermal efficiency. By upgrading both the intake and exhaust sides of the turbo system, this bundle eliminates horsepower-robbing boost leaks and reduces exhaust gas temperatures (EGTs).

The 4-inch aluminum intake pipe features a surge ring and connects to a dedicated air box enclosure with a high-flow dry filter and Outerwears pre-filter. On the charge side, the 3.5-inch cold side pipe utilizes a CNC-machined flange with a double O-ring seal to ensure a leak-free connection, while the 3-inch hot side pipe provides a direct path for compressed air. The package is completed with a 3.5-inch ceramic-coated and heat-wrapped downpipe that mates directly to the DOC outlet and factory exhaust system.

• 4 in. Aluminum intake pipe with air box enclosure and dry filter assembly
• 4 in. Intake horn with PCV port and surge ring
• 3.5 in. Cold side intercooler pipe (Passenger side) with CNC machined flange
• 3 in. Hot side intercooler pipe
• 3.5 in. Ceramic coated and heat-wrapped downpipe
• High-quality reinforced silicone boots and stainless steel T-bolt clamps
• Outerwears pre-filter cover included
• Retains factory connection points and all OEM sensors
• No tuning required; direct bolt-on installation
• Finished in WCFab signature Gloss White powder coat
• Made in the USA
• Manufacturer Part Number: WCF100418-GW