Mishimoto 17-19 GM 6.6L L5P Intercooler Pipe and Boot Kit Polished

If you're looking to get the most out of your 2017-2019 Chevrolet Silverado 2500 HD or GMC Sierra 2500 HD with the 6.6L Duramax L5P engine, improving airflow is a key step. The factory intercooler pipes can be a bottleneck, with their smaller diameter and restrictive bends. This Mishimoto kit replaces those stock pipes with larger, smoother ones designed to let your engine breathe easier.

This kit features 3-inch diameter, mandrel-bent aluminum pipes that maintain a consistent flow path from the turbocharger to the intercooler and back. By eliminating the stock resonator on the hot-side pipe and smoothing out the bends, Mishimoto claims up to a 55-percent reduction in restriction compared to the factory setup. This means more air can reach your engine, potentially leading to improved power and efficiency. The kit also includes silicone boots made with DuraCore™ technology, which Mishimoto says offers better resistance to heat, pressure, fuel, and oil than standard silicone, helping to prevent leaks and blowouts over time. For a secure connection, the kit comes with constant-tension T-bolt clamps and a quick-disconnect fitting on the cold-side pipe with a new O-ring and spring clip.

Mishimoto also thought about the details that make installation smoother and the system more reliable. The pipes retain the factory mounting location for the intake air temperature harness, keeping your wiring tidy. Plus, there are two extra bungs that can be drilled and tapped for aftermarket sensors, allowing you to easily monitor your engine's performance. This kit is a direct bolt-on upgrade and comes with Mishimoto's Lifetime Warranty.