BD-3204-002HS Cylinder Head Kit Fits CAT Fits Caterpillar 910 931B D3BOne New Aftermarket Replacement Engine Cylinder Head Gasket Set Fits Caterpillar Industrial Construction Models: 931B, D3B, 910 Cylinder Head Replacement (HS) contains all of the parts necessary to remove and replace all the cylinder heads for the engine. The kit will typically include the following: Cylinder head (valve grind) set Fuel injector O rings (unless noted otherwise) Manifold gaskets & O rings Turbo mounting gaskets & O rings Replaces Part