These are our Perkins 400 Series 4 Cylinder diesel engines for industrial use, including power units. All new perkins engines come with a 2 year, 2000 hour warranty. Please call for core criteria and to get the correct build for your machine. You can also fill out a quote form at the bottom of this page with all the information you currently have on your engine and we will reply very shortly with a quote or inquiring about additional info we may need. Refer to this photo of a Perkins Tag with the build list and serial number circled. This is the information we need to get you the correct build for your industrial equipment.