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 Kit includes stainless steel hardware Gaskets are available separately Replaces Cummins 3967995, 3943871 & 3943875