This is an intercooler piping coupler for 2003-2009 Chevrolet Kodiak and GMC Topkick C4500, C6500, C7500, and C8500 trucks. This is a brand new coupler. This is a black reinforced rubber coupler for the cold side on the intercooler piping. This is for those trucks equipped with the turbocharged engines. This has a 3" interior diameter.

GM Part # 15086267

Item is number 6 in the GM diagram.