These BD Diesel performance manifolds for the 5.9L and 6.7L Cummins are now available at a lower price of $525. Their internal geometry is optimized through Computational Fluid Dynamics (CFD), which increases flow all through the RPM band for your high-flowing T4- or T6-based turbo. Thick wall cast high silicone ductile iron retains heat energy. Precision slip joints also allow the manifold to expand and contract; they allow the manifold to expand and contract, reducing cyclic thermal fatigue and greatly optimizing manifold longevity. 1/8 NPT ports are pre-drilled and tapped for pyrometer probes and pressure gauges. All in all, you'll have better cylinder evacuation to keep EGTs down and improved turbo response. For more information, call 800-887-5030 or visit www.bddiesel.com.
Photo credited to BDDiesel.com