This is a replacement metallic gasket by Skyline Emissions Inc. It is used on DPFs used on Caterpillar C9, C13, and C15 engines. This gasket is applicable with both Skyline and OEM part numbers. <BR<BR Applicable Skyline Part Number:<BR A-CPXH-CQ1702<BR<BR Applicable OEM Part Numbers:<BR 290-0045, 301-7856, 10R-6088, 291-8515, 309-6991, 10R-6087