Quick view BD Diesel BD Diesel Manifold Exhaust - 2001-2010 Duramax - 1041460 Compare $190.99 You may not know it, but the factory drivers side exhaust manifold is pinched down to allow for steering shaft clearance, which actually is not required. As a result, thismanifold only flows 80-percent of the passenger side. BDs Full Bore exhaust... Add to Cart Add to Cart