GMC Sierra 2500 HD Intercooler Kit - Mishimoto - Duramax 6.6L - Black - `11-`15. A complete intercooler solution for 2011–2015 GMC Sierra 2500/3500 HD trucks with the 6.6L Duramax (LML), designed to improve charge-air cooling and flow while maintaining durability for daily use and modified setups.

This Mishimoto intercooler kit replaces the restrictive stock components with mandrel-bent aluminum piping and a larger bar-and-plate intercooler core. The kit includes 3.5" cold-side and 3.0" hot-side pipes, Mishimoto silicone boots built with DuraCore for improved resistance to heat, pressure, fuel and oil, and constant-tension T-bolt clamps for secure sealing. The intercooler uses cast aluminum end tanks and a thicker, higher-volume core to help reduce intake temperatures and support increased boost tolerance. Offered in Stealth Black finish, the kit contains all primary components required for a direct-fit upgrade and is backed by Mishimoto’s lifetime warranty.

Features

• Direct-fit for 2011–2015 Duramax 6.6L LML trucks
• Bar-and-plate core with cast aluminum end tanks (101% more core volume, 73% thicker vs stock)
• Mandrel-bent aluminum piping (3.5" cold-side / 3.0" hot-side)
• Mishimoto DuraCore silicone boots and constant-tension T-bolt clamps
• Stealth Black finish; lifetime warranty from Mishimoto

If you have questions or want guidance on fitment or installation, call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We have two installation and customization shops — Austin, Texas and Los Angeles, California area — and we offer on-premises installation at both locations. If you are considering purchasing multiple items, please contact us for shipping discounts. We install on premises at both locations.

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