made for generators and other engines that run at a constant RPM. Not for autos or trucks. STANADYNE DB2-4373 FUEL INJECTION PUMP (some of my stock is plain silver- no paint) 3600 RPM CUMMINS P/N CO147046513 ONAN P/N 147-0465-13 NEW OLD STOCK This pump has been in storage for maybe 25 years. There is a small amount of oil present on the shaft area and has seeped onto the plastic wrapper in box. Also expect there to be a little dust and or shelf grime in the nooks and crannies. Some of these are painted and some are not. Some still have test fluid present some do not. You may see minor oxidation on the aluminum or steel parts. I have sold dozens of these to date (11-29-2015) with no returns or complaints. Please know what you are buying I cannot take returns on this pump. NO RETURNS ACCEPTED. WINNER PAYS calculated SHIPPING AND HANDLING After purchasing, pay instantly with your ** through PayPal! On Nov-02-06 at 05:44:59 PST, seller added the following information: 3600 RPM Don't forget to click on SEE ALL CATEGORIES in the left hand navigation bar. Posted with Mobile 11-3-21