2011-2016 LML Duramax 3.5" Passenger (Cold) Side Intercooler Pipe Kit

A cold side pipe that holds boost

Wehrli replaces the failure-prone factory LML passenger (cold) side pipe with a larger one-piece 3.5 in. pipe in 14 ga aluminum, which Wehrli says flows 23% better than stock.

It replaces the factory two-piece plastic pipe, swaps the factory clip ring for a silicone boot with stainless T-bolt clamps, and has a threaded bung to reuse the factory intake temperature sensor. It works with the factory Y-bridge and crossover pipe.

Wehrli says the better flow between the turbo and engine improves efficiency, throttle response and spool. It fits stock trucks with no other changes or tuning and installs with basic hand tools.

Who it's for

LML owners, stock or modified, who are tired of blown cold side boots and boost leaks.

Key specs (per Wehrli)

What's included

• 3.5 in. cold side intercooler pipe
• Silicone boots and stainless T-bolt clamps; powder-coated finish

Fitment notes

• Fits 2011-2016 Chevrolet Silverado / GMC Sierra 2500 HD and 3500 HD with the 6.6L LML Duramax.
• Replaces GM part numbers 22737494, 20930188, 23421455 and 84094727.
• California: Wehrli does not ship this part to California.

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