The BD Full Bore Exhaust Manifold for the Chevy Duramax engine replaces factory driver's side "pinched down" unit, restoring exhaust flow and balances the V8 engine for smother running. Made from high-silicon ductile iron, the Full Bore is a direct, bolt-in replacement for the factory manifold and is even drilled and tapped to accept the most popular EGT probes.. The BD Full Bore Exhaust Manifold for the Chevy Duramax engine replaces factory drivers side pinched down unit, restoring exhaust flow and balances the V8 engine for smother running. Made from high-silicon ductile iron, the Full Bore is a direct, bolt-in replacement for the factory manifold and is even drilled and tapped to accept the most popular EGT probes.. Exhaust Manifold; Left; Drivers Side; Incl. Manifold; 1/4 in. NPT Plug And 1/4-1/8 in. Adapter;. BD Duramax Exhaust Manifold Chevy/GMC 2001-2010 LB7/LLY/LBZ/LMM. BD Diesel Manifold Exhaust - 2001-2010 Duramax. Tapped To Accept The Most Popular EGT Probes. EXHAUST MANIFOLD CHEVY 2001-2010 DURAMAX. Direct, bolt-in replacement. Direct Bolt-In Replacement. High-Silicon Ductile Iron. Exhaust Manifold

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