The perfect drop-in performance replacement. Fully divided pulse manifold made from high-silicon ductile iron is designed to withstand extreme temperatures and vibration. Great for both stock and performance trucks. Designed using modern technology that utilizes pulse flow for quicker turbo spool and increased power. Precision slip joints allow the manifold to expand and contract, which reduces cyclic thermal fatigue and greatly increase manifold longevity. FEATURES Fully divided pulse manifold design Pre-drilled for pyrometer probes High-silicon ductile iron Designed to withstand extreme temperatures and vibration Great for stock and performance installations Connection joints allows for expansion and contraction Prevents cracking or exhaust leaks Quicker turbo spool up Reduced back-pressure Increased power Gaskets are available separately Replaces Cummins # 3946036 INSTALL TIME 1 Hour WARRANTY Parts 36-Months 75,000 Miles NOTE 1045985 can be used as a direct replacement for Cummins part number 3946036 used on pick-up engines. VIDEOS The BD Diesel Difference What Does It Take To Create Performance Manifolds?