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01-16 6.6L GM Duramax Updated Left Exhaust Manifold

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Description Exhaust Manifold Kit for 2001 – 2016 Chevrolet / GM 6.6L Duramax Left / Drivers Side Manifold Dorman # 674-731 Reference # 12637647 Upgrade For The 2001-2008 (No Pinch) – Stock Replacement For 2009-2016 Fits All 6.6L Engines LB7, LLY, LBZ, LMM & LML from 2001-2016