This is the Cold Weather Package that works with the condenser mounted Bullet Proof Oil Cooling System. This upgrade allows you to regulate your engine oil temperatures and oil pressures in extreme cold conditions. The oil temperature is regulated to a minimum 180°F. This allows you to keep your 6.0L diesel engine oil warm when mother nature is at her wintery worst. The oil pressure regulator prevents low engine oil conditions for high-performance and extreme cold weather conditions.