Fit For? Compatible with Detroit Diesel S60 Engine. Replacement OE Number? 23531246 R23531258 R23535018. Please check if the item we show is identical to yours vehicle year & make & model. Package Includes? 1Mechanical Water Pump, 1 Pump Belt. If there are any quality issues within the 1 year of the water pump you ordered, we will provide you with a free replacement. Your satisfaction has always been our pursuit, and look forward to you could recommending us to your friends who need to replace the water-pump. Thank you very much!