Hi I have a 2007 Freightliner Columbia with a MXS cat engine. I am replacing the injector cups/sleeves. I ordered the cups using my serial number, however the one I pulled out is a different serial number. I was given 263-4920 from the dealer, however I took out 227-4239 from my engine. When side by side I notice a millimeter of difference. On the cat website when I enter my engine serial number both cups say "Verified part-to-equipment match." What do you guys recommend? 263-4920: Sleeve-Injector | Cat® Parts Store 227-4239: SLEEVE | Cat® Parts Store MXS83337
Could just be a updated or superseded part# . A lot of times part numbers get updated as years go by. Its probably a better design cup.
