The aFe 46-40054 is an engine-specific One-piece cast ductile iron with cast-in EGR flanges, machined ports and merged runners. This replaces the manifold feeding the turbocharger, not a complete exhaust system, muffler or tailpipe.
| Years | Model | Exact engine / requirements |
|---|---|---|
| 2007.5–2018 | Dodge Ram / Ram 2500 and 3500 | 6.7L Cummins inline-six turbo diesel; actual production/interface and retained EGR required |
46-40054: The current exact page and May 2021 guide cover 2007.5–2018, beyond the older listing title's 2015 end. Step 24 specifies a supplied 50 mm stud at the lower cylinder-5 hole, matching the BOM; step 25 instead names a 30 mm bolt and nut that the BOM does not list. Resolve that hardware discrepancy for the actual kit rather than substituting a guessed bolt. The exact guide says the original exhaust-manifold heat shield is not reused, while other original equipment is restored; its generic reverse-order instruction does not override that specific exception.
| Detail | Value |
|---|---|
| Manufacturer Part Number | 46-40054 |
| Configuration | Engine-specific exhaust manifold; EGT probes and gauges are separate |
| Material / runners | One-piece cast ductile iron with cast-in EGR flanges, machined ports and merged runners. |
| Finish | No coating, polished tip or heat-wrap package is certified by the exact written sources |
| Fasteners / torque | 32 ft-lb for anti-seize-treated manifold fasteners in the recommended factory sequence; recheck connections after 100–200 miles. Resolve the 50 mm stud versus 30 mm bolt discrepancy before assembly; this torque is not every plug/turbo/clamp setting. |
| Retained equipment / installation | Retains the factory EGR system. Installation removes EGR cooler/bypass, transfer manifold and associated tubes, drains coolant, and removes the original manifold and turbo together. The original exhaust-manifold heat shield is not reused; restore the remaining original systems and refill/bleed coolant. |
| Emissions | Current exact manufacturer page cites D-550-39; official indexed Exhibit A lists this exact part/engine/year. Match the actual application and order conditions; a family citation is not unrestricted approval. Its indexed scope is 2007–2018 6.7L turbo diesel; the exact manual further specifies 2007.5 production. |
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
An exhaust manifold for the listed 6.7L Cummins inline-six turbo diesel; actual production/interface and retained EGR required. It is not an entire exhaust or a guarantee of a particular sound level.
Which material and construction does this part use?One-piece cast ductile iron with cast-in EGR flanges, machined ports and merged runners.
Are the required gaskets included?Six port gaskets are included per the exact page; the guide lists one gasket set. It also reuses the original turbo gasket and EGR-tube gaskets in its procedure; inspect them and follow the correct service requirements.
Does it include EGT probes or gauges?No such equipment is included in the exact contents. Match any separate probe to the actual port and seal unused openings.
What water-line or retained-equipment work is required?Retains the factory EGR system. Installation removes EGR cooler/bypass, transfer manifold and associated tubes, drains coolant, and removes the original manifold and turbo together. The original exhaust-manifold heat shield is not reused; restore the remaining original systems and refill/bleed coolant.
What is the manifold torque and recheck interval?32 ft-lb for anti-seize-treated manifold fasteners in the recommended factory sequence; recheck connections after 100–200 miles. Resolve the 50 mm stud versus 30 mm bolt discrepancy before assembly; this torque is not every plug/turbo/clamp setting.
Are any exact-source packaging or procedure conflicts unresolved?The current exact page and May 2021 guide cover 2007.5–2018, beyond the older listing title's 2015 end. Step 24 specifies a supplied 50 mm stud at the lower cylinder-5 hole, matching the BOM; step 25 instead names a 30 mm bolt and nut that the BOM does not list. Resolve that hardware discrepancy for the actual kit rather than substituting a guessed bolt. The exact guide says the original exhaust-manifold heat shield is not reused, while other original equipment is restored; its generic reverse-order instruction does not override that specific exception.
What emissions application is documented?Current exact manufacturer page cites D-550-39; official indexed Exhibit A lists this exact part/engine/year. Match the actual application and order conditions; a family citation is not unrestricted approval. Its indexed scope is 2007–2018 6.7L turbo diesel; the exact manual further specifies 2007.5 production.
46-40054: inspect every connection and resolve the documented kit discrepancies before operation.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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