Mishimoto MMBK-DMAX-04BK Factory-Fit Boot Kit for 2004.5-2005 Duramax 6.6L

Vehicle Fitment

• 2004.5-2005 Chevrolet/GMC 6.6L Duramax (LLY) Diesel

Features

• Direct-fit factory replacement boot kit for Duramax turbo diesel
• Mishimoto DuraCore™ five-layer silicone construction
• Superior resistance to heat, pressure, fuel, and oil vs OEM boots
• Constant-tension T-bolt clamps for secure, consistent sealing
• Designed to prevent blowouts under high load or boost
• Includes boots for intercooler, charge piping, and turbo connections
• Compatible with stock or aftermarket intercoolers
• Mishimoto Lifetime Warranty for peace of mind

Specifications

• Material: DuraCore™ silicone with embedded heat-resistant fibers
• Temperature Rating: Up to ~428 °F external, ~572 °F internal
• Boot Count: Includes 4 silicone boots
• Clamp Count: 8 constant-tension T-bolt clamps
• Fitment Side: Intercooler and turbocharger piping
• OEM Replacement: Direct fit to 2004.5-2005 Duramax plumbing
• Color: Black silicone
• Warranty: Mishimoto limited lifetime coverage

Included Components

• 4x Silicone boots with DuraCore™ technology
• 8x Constant tension T-bolt clamps
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMBK-DMAX-04BK Factory-Fit Boot Kit is a direct replacement for the aging factory silicone boots on 2004.5-2005 Chevrolet and GMC trucks equipped with the 6.6L Duramax (LLY) diesel engine. Over time, OEM boots can become brittle or fail under heat, pressure, and fuel exposure. This kit uses Mishimoto's advanced DuraCore™ five-layer silicone construction to provide superior resistance to heat, pressure, fuel, and oil - helping eliminate leaks and potential blowouts during heavy towing or boost conditions.

Each boot in the kit is sized to match factory intercooler, turbo inlet, and charge piping locations for a direct and secure fit. The included constant-tension T-bolt clamps give strong, uniform clamping force that can withstand repeated thermal cycles without loosening. Whether you're restoring your truck to factory performance after years of use or upgrading durability before heavy towing or performance modifications, this factory-fit boot kit gives you reliable, long-lasting hoses that outperform OEM units backed by Mishimoto's lifetime warranty.