2003-2014 HD Front Differential Cover Black (238041020)Description Our Dodge Ram Diff cover is equipped with internal heat sinks and external cooling fins, increasing the pans surface area helping dissipate heat. This makes for a much cooler and denser oil to lubricate with. Cool, dense fluid lubricates better, which will extend differential service life. The internal heat sinks are 7 8 of an inch tall while the external fins measure nearly 1 2 an inch. To keep the fluid clean, PPE installed its exclusive