Exhaust Gas Recirculation EGR Pipes are very easy to use and simple to handle. Exhaust gases from the exhaust manifold are directed via the EGR system through EGR pipes. The gases are eventually recirculated back into the combustion chambers and burned again. They are easily operated and require low maintenance too. Exhaust Gas Recirculation EGR Pipes can be used on a variety of diesel engines, including light, medium, and heavy-duty diesel engines, as well as two-stroke low-speed marine engines. They are very effective as well as economical to use.