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The Exhaust Gas Recirculation Valve or (EGR) Valve as most refer to it is designed to cool exhaust gas by burning exhaust for a second time ---READ-MORE

from About.com Autos

What Does an EGR Valve Do?

What Does Your Car's EGR or Exhaust Gas Recirculation Valve Do?: This is a typical EGR valve. It's easy to clean or replace your EGR valve if your car or truck's performance starts to suffer.

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Exhaust gas recirculation (egr) system 1989 tbi - GM Square Body - 1973 - 1987 GM Truck Forum

Designing and producing DeNOx systems calls for three processes and three areas of expertise: Selective Catalyst Reduction (SCR), NOx traps and exhaust gas recirculation (EGR).

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This 2016 market research report on Global Automotive Exhaust Gas Recirculation System Sales Market is a meticulously undertaken study. Experts with proven credentials and a high standing within the research fraternity have presented an in-depth analysis of the subject matter. Browse the full report @ http://www.orbisresearch.com/reports/index/global-automotive-exhaust-gas-recirculation-system-sales-market-2016-industry-trend-and-forecast-2021 .