BD Diesel 1041460 Exhaust Manifold for 2001-2007 Duramax Diesel. You may not know it, but the factory driver's side exhaust manifold is pinched down to allow for steering shaft clearance, which actually isn't required. As a result, the stock exhaust manifold only flows 80% of the passenger side. BD's Full Bore exhaust manifold restores exhaust flow balance, improving power and reducing EGT. The BD Diesel 1041460 exhaust manifold is made from high silicon ductile iron, the Full Bore exhaust manifold is a direct, bolt in replacement for the factory manifold and is even drilled and tapped to accept the most popular EGT probes. BD Diesel 1041460 exhaust manifold 2001-2007 Duramax 1041460APPLICATIONS:: 2001-2007 DURAMAX We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.