2020-2026 L5P Duramax Stage 1 High Flow Intake Bundle Kit

Fix the factory leak points

Stage 1 targets the charge pipes between the turbo and the engine on the 2020-2026 L5P, where factory weak points can cause boost leaks or outright failures in hard-working trucks.

Wehrli swaps the two-piece 2.5 in. hot side pipe and the plastic-and-rubber cold side pipe for one-piece 3 in. and 3.5 in. pipes in 14 ga mandrel-bent aluminum. The hot side drops the factory middle boot joint, and the cold side uses a CNC-machined flange and black anodized billet adapter with twin O-rings in place of the factory clip ring.

Wehrli says this improves efficiency, throttle response and spool. Factory connection points and sensors are kept.

Who it's for

2020-2026 L5P owners, stock or modified, who want to stop boost leaks and improve charge-air flow.

Key specs (per Wehrli)

What's included

• Intercooler pipes: 3 in. hot side, 3.5 in. cold side
• Billet adapter and machined flange with O-rings
• Intercooler outlet clip
• Boots (silicone) and stainless T-bolt clamps; powder-coated finish

Fitment notes

• Fits 2020-2026 Chevrolet Silverado / GMC Sierra 2500 HD and 3500 HD with the 6.6L L5P Duramax.
• Installs with basic hand tools.
• California: Wehrli does not ship this part to California.

Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.