Tryin to decide if my 94 xlt explorer is worth upgrading. Got 260k miles, bone stock, but she runs mint. Just replaced the following: EGR valve replaced EGR tube replaced DPFE sensor replaced Spark plugs replaced Plug wires replaced Ignition coil replaced Checked the cats (clean) Fuel filter replaced Fuel pump replaced But the 260k is making it a difficult decision. So, back to the main idea... how many miles do you have? How long do they last?