GMC Sierra 2500 HD Intercooler Boot Kit - Mishimoto - Hot-Side Boot Kit with DuraCore technology - 11-14 is a direct-fit silicone hot-side boot kit designed for 6.6L LML Duramax trucks from 2011–2014. It replaces factory boots with a durable, performance-minded solution that resists common diesel under-hood hazards.

This Mishimoto kit uses DuraCore technology — a reinforced inner layer engineered for greater resistance to heat, pressure, fuel, and oil compared to standard silicone. The five-layer silicone construction and included constant-tension T-bolt clamps help prevent leaks and blowouts while maintaining factory fitment. The kit is intended for enthusiasts who want reliable, long-lasting intercooler connections during towing, towing with added power, or heavy-duty use. Mishimoto’s lifetime warranty covers the kit for manufacturing defects.

Features

• Direct-fit hot-side boot kit for 2011–2014 GMC Sierra 2500 HD (6.6L LML Duramax)
• DuraCore reinforced inner layer for improved resistance to heat, pressure, fuel, and oil
• Five-layer 100% silicone construction
• Includes constant-tension T-bolt clamps for consistent clamping force
• Maintains factory fitment and backed by Mishimoto lifetime warranty

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

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