Up-Pipes Kit Ford 7.3L PowerStroke 1999.5-2003 F-250 / F-350 / Excursion / E-350Replaces the factory exhaust up pipes (exhaust manifold to the turbo) which are prone to leakage due to the deterioration. BD up pipes are designed to minimize restriction to the turbo utilizing internally shielded expansion bellows . The turbo Y adapter is made from high silicon ductile iron. The BD up pipes are a durable, longer life replacement for this common problem and are perfect as an upgrade while performing other engine or transmission