GMC Sierra 2500 HD Intercooler Kit - Mishimoto - Duramax 6.6L LML - Silver - `11-`15. This complete Mishimoto intercooler kit is designed for 2011–2015 Duramax LML trucks and provides upgraded cooling capacity and improved airflow for owners modifying or maintaining their trucks.

The kit includes a large bar-and-plate intercooler with cast-aluminum end tanks, mandrel-bent aluminum intercooler pipes, silicone boots with Mishimoto DuraCore construction, and constant-tension T-bolt clamps. The intercooler increases core volume and thickness compared to factory units (Mishimoto specifies a 101% increase in core volume and 73% greater thickness), helping lower intake temperatures and reduce exhaust gas temperatures under higher loads. Pipes are polished aluminum with reduced bends to promote smooth airflow; cold-side and hot-side diameters are 3.5" and 3.0", respectively. All components are built to resist heat, oil, and pressure and are backed by Mishimoto’s Lifetime Warranty.

Features

• Bar-and-plate core with cast aluminum end tanks
• 101% larger core volume, 73% thicker than factory
• 3.5" cold-side and 3.0" hot-side mandrel-bent aluminum piping
• Mishimoto DuraCore silicone boots and constant-tension T-bolt clamps
• Finish: Silver; fits 2011–2015 Duramax LML applications

If you have questions or want help confirming fitment or options, call us directly — we’re happy to help. We have two installation and customization locations in Austin, Texas and the Los Angeles, California area and offer on-premises installation at both shops. Call 512-982-9393 (TX) or 562-981-6800 (CA) to speak with our techs or to schedule installation. If you’re considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov