Want performance and tunability for your OM617? These M pumps provide just that! Unlike the MW pumps, you can tune and adjust the fuel to your liking using the external ALDA. These are a direct replacement of the MW pumps found on all US Mercedes-Benz OM617 engines. These rare M pumps had to be imported from Europe. Choose from the following element size: -6 mm for up 110 cc -7.5 mm for up to 160 cc (Dieselmeken) Both come equipped with an external ALDA. Your pump will be built in-house and usually only takes a few days, but can take up to a couple weeks, depending on our current queue. We test run every pump on an engine before shipping to be sure everything is right. We include everything you'll need to install your M pump in place of an existing MW pump: -Block to pump gasket -Plug for the existing MW pump oil feed (not used with M pumps) -Fitting to put an 8mm hose from the included lift pump to your fuel filter housing. Watch this video to see how it's installed and see it in action! https://youtu.be/LSQYEorDLK0 You do not need to send us a core or pay extra for one as the purchase is an out-right sale. You are welcome to send us a diesel pump core from another Mercedes-Benz. We will refund the following values from your order, once we receive your core(s): $350 for OM603 and 1995 OM606 $2500 for OM602 $300 for OM617 M $100 for OM606 and OM605 EDC $100 for OM617 MW