With flight numbers of 13 | 5 | -0.5 | 2, the Engine is built from the ground up to be a reliable workhorse driver. As the first 13-speed disc in the Streamline lineup, higher-power players will see the Engine stand up and cruise down the fairway, while average-power throwers will get shorter straight flights with a reliable finish. One thing you can be sure of is that the Engine will fight to stay on whatever line you throw it.