Mishimoto MMBK-DMAX-04BK Chevrolet/GMC 6.6L Duramax Factory-Fit Boot Kit, 2004.5-2005, Black Direct fit for the 2011+ Chevrolet/GMC 6.6L Duramax Five layers of 100% silicone for maximum durability and blowout prevention DuraCore technology provides resistance to heat, pressure, fuel, and oil Includes high-quality constant-tension T-bolt clamps Mishimoto Lifetime Warranty