BD Diesel 1045987 Pulse Exhaust Manifold for 2003-2007 Dodge Ram 5.9L Cummins

Vehicle Fitment

• 2003-2007 Dodge Ram 2500 5.9L Cummins Diesel
• 2003-2007 Dodge Ram 3500 5.9L Cummins Diesel

Fitment Notes

• Direct replacement for Cummins PN 3967995, 3943871, 3943875
• Also used on motorhomes, industrial, and commercial Cummins 5.9L engines
• No EGR provision
• Gaskets NOT included -- order BD Diesel 1045986 gasket set separately
• Replacement bolts NOT included -- order BD Diesel 1045982 bolt and spacer kit separately
• T4 turbo flange version available: 1045987-T4

Features

• Fully divided pulse manifold design
• Balances exhaust pulses to reduce cylinder load and backpressure
• High-silicon ductile iron construction -- resists cracking from thermal cycling
• Precision slip joints allow expansion/contraction -- reduces cyclic thermal fatigue
• Pre-drilled and tapped for pyrometer probe (1/8" NPT plugs included)
• Modern internal geometry for optimized exhaust flow
• Painted finish for corrosion resistance

Specifications

• Material: High-Silicon Ductile Iron
• Finish: Painted
• Pyrometer Port: Pre-Drilled, 1/8" NPT (plugs included)
• Turbo Flange: OE Style (T4 version: 1045987-T4)
• Fitment Type: Direct Fit
• Sold Individually
• UPC: 990011401791

Included Components

• 1x Front manifold assembly
• 1x Rear manifold assembly
• Mounting bolts, stainless steel washers, nuts, studs
• 1/8" NPT pyrometer plugs
• Coolant bracket and hardware

Product Description

The BD Diesel 1045987 Pulse exhaust manifold is a direct replacement for the factory unit on 2003-2007 Dodge Ram 2500/3500 trucks with the 5.9L Cummins diesel. The fully divided pulse design balances exhaust pulses across cylinders, reducing exhaust gas temperatures, backpressure, and cylinder load for improved fuel economy and engine longevity.

Constructed from high-silicon ductile iron with precision slip joints, this manifold resists the cracking that commonly plagues the OE cast iron unit from repeated heat cycling. Pre-drilled pyrometer ports allow easy EGT monitoring. Gaskets and mounting bolts are not included and should be ordered separately. Covered by BD Diesel's 36-month / 75,000-mile warranty.