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FAQs about Diesel Exhaust Fluid (DEF) Disclaimer. How does EGR work and why is this technology essentially being replaced by SCR? EGR stands for Exhaust Gas Recirculation.
Diesel exhaust fluid is one of the key elements of the Selective Catalytic Reduction (SCR) process used by most medium and heavy-duty engine builders to meet EPA 2010 regulations.
Make sure this fits by entering your model number.; Useful for adding brake fluid to master cylinders on mini-vans, adding gear lube to differentials, filling the DEF reservoir on GM Duramax diesels as well as other applications