The splash pans are there in case you drop a small part while working on the engine. They direct said part to the most inconvenient spot in the exact geographical center under the car, requiring you to climb under the car each time you drop a part in order to retrieve it. This is amazingly consistent regardless of the size, shape, or weight of the part as long as it is small enough to roll or slide off the back end of the pan. Without the pans, the part will drop straight down to the earth, with a reasonable chance of rolling and/or bouncing to a location where it can be easily reached.![]()