If you are looking to purchase Cummins parts for your vehicle, you should search carefully because there are a lot of fake products circulating in the market these days. The difference between genuine and fake Cummins products is not always easy to see especially for someone who is not an expert. It can be something as small as a ring gap that is a couple of millimeters wider compared to a non-genuine product. In a Cummins engine, even that small difference could result into less power, poor fuel economy, insufficient lubrication, premature wear or even catastrophic engine failure.