Having the SCR system separate from the engine has a number of advantages.

• More power – Engines can be adjusted to maximize horsepower versus wasting it on a larger cooling system
• Better fuel economy – Smaller engine displacement can be used with greater horsepower, leading to fuel savings
• Better reliability and durability – Thanks to reduced heat rejection of internal engine components
• More fuel choices – The engine can still run on all diesel fuel varieties and grades – including up to 100 percent biodiesel