This GReddy high capacity differential cover will prolong the life of your expensive differential. Extreme motorsports such as drifting, circuit racing, or rallying quickly increases the oil temperature in your differential causing it to not work 100%. Greddy differential cover adds capacity of differential oil and extended heat capacity to the differential. The casting comes with baffles and fins to help dissapate the heat while keeping the oil where you need it. This item is a must have for anyone with an aftermarket LSD. This is considerably lengthen the life of your LSD.