Experience unparalleled performance and durability with our enhanced GMC/Chevrolet truck exhaust manifolds, specifically designed for LS engines. Our BD-upgraded manifolds address common exhaust manifold bolt failures by incorporating extended fasteners and spacers that effectively withstand thermal expansion. In addition, we've engineered adjusted mounting locations for the heat shield. Crafted with precision, our BD Manifolds boast a robust, thicker design. They are constructed from high-silicon ductile iron to combat warping, ensuring your vehicle remains at peak performance for the long haul.

Features:

• OEM replacement
• Designed to fit 2002-2013 GM LS based truck engines
• Made with high-silicon ductile iron
• Uniform increased wall thickness throughout the entire manifold reduces stress risers and helps prevent cracking
• Utilizes longer bolts and added spacers to reduce stress on fasteners (15mm Longer)
• Machined bolt mating surfaces for secure bolted joint
• Heat shield mounting bosses
• Kit includes all new bolts, spacers, and gaskets
• Replaces GM OEM Part #12616286 #12677665
• SEMA Certification No. SC-BDD01-0136