Why settle for stock performance when your truck has so much more to give? Transitioning to a second-gen manifold setup is the classic path toward better flow and lowered exhaust gas temperatures.
Finding the Best 2nd Gen Swap Kit 6.7 Cumminses requires matching your specific turbo configuration to your cooling and oiling requirements. Getting this hardware right ensures your engine stays reliable under heavy load.
Key Takeaways
- Prioritize stainless steel braided oil lines for their resistance to high underhood temperatures.
- Confirm your drain tube diameter matches the specific S300 or S400 turbo housing you plan to run.
- Always check that your intake and grid heater upgrades offer improved flow without sacrificing structural integrity.
- Verify that your coolant bypass components are rated for the high pressure fluctuations of a modified engine.
- Ensure all included hardware is corrosion resistant to avoid future leaks in the cramped engine bay.
| Top Tier Reliability |  |
Stainless Steel Turbo Drain Kit | Prevents oil leaks | High heat resistance | Flexible braided construction | View on Amazon | Read Review |
| Essential Swap Component |  |
Turbo Drain Tube Extension Kit | Corrects drain geometry | Direct fitment | Robust seal quality | View on Amazon | Read Review |
| Superior Airflow Upgrade |  |
Banks Monster-Ram Intake Kit | Increases air density | Faster turbo spool | Improved internal flow | View on Amazon | Read Review |
| Robust Flow Solution |  |
BD Diesel Exhaust Manifold Kit | Prevents manifold cracking | Improved exhaust scavenging | High durability casting | View on Amazon | Read Review |
| Pro Level Plumbing |  |
10AN Turbo Drain Upgrade | High volume capacity | Reusable fitting design | Secure bolt-on connection | View on Amazon | Read Review |
| Clean Engine Maintenance |  |
Cummins Crankcase Filter Kit | Maintains factory pressure | Prevents intake oiling | Simple replacement part | View on Amazon | Read Review |
| Streamlined Cooling Plumbing |  |
Heater Hose Quick-Delete Kit | Eliminates plastic fail points | Secure threaded connection | Clean engine appearance | View on Amazon | Read Review |
| Cylinder Head Protection |  |
Fleece Coolant Bypass Kit | Reduces peak temps | Protects head gaskets | Better thermal stability | View on Amazon | Read Review |
| Electrical Signal Reliability |  |
Tuner Harness Repair Kit | Restores signal integrity | OEM quality pins | Durable weather-proof housing | View on Amazon | Read Review |
| Total Hardware Refresh |  |
VGT Turbo Installation Kit | Includes all gaskets | High strength studs | Simplified install workflow | View on Amazon | Read Review |
More Details on Our Top Picks
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Stainless Steel Turbo Drain Kit
If you are moving to a second gen manifold, your factory oil drain tube is going to be far too short to reach the new turbo position. This stainless steel braided line provides the flexibility you need to make that connection without risking a kink or a stress fracture.
It is best for builders who want a leak-free solution that handles engine vibration better than a rigid pipe. Just keep in mind that you need to be very careful when routing the line to avoid any hot exhaust components.
- Material:Stainless steel
- Configuration:Braided oil feed
- Additional Feature:Includes necessary connectors
- Additional Feature:Durable mounting hardware
- Additional Feature:Designed for swap clearance
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Turbo Drain Tube Extension Kit
Swapping your manifold is like moving furniture into a new room, where suddenly the cords don't reach the outlets. This kit acts as an extension cord for your oil drain, ensuring your turbo stays lubricated without pulling against the block.
You will appreciate the simple design that removes the guesswork from fitting a new charger. However, ensure your drain flange orientation matches the specific turbo model you chose for the swap.
- Compatibility:5.9L and 6.7L Cummins
- Configuration:Turbo drain extension
- Additional Feature:Includes mounting hardware
- Additional Feature:Corrosion resistant finish
- Additional Feature:Easy installation process
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Banks Monster-Ram Intake Kit
Getting more air into the cylinders is the goal of any performance build. The Monster-Ram intake provides a much smoother path for air, effectively reducing the internal restriction found in the factory plastic or cast pieces.
It is a great choice if you are aiming for improved throttle response across the board. Be aware that this is a larger component, so you might need to adjust your nearby sensor wiring for a clean look.
- Brand:Banks Power
- Configuration:Intake manifold
- Additional Feature:Includes grid heater delete
- Additional Feature:Large diameter housing
- Additional Feature:Precision CNC machined
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BD Diesel Exhaust Manifold Kit
The factory manifold is often a bottleneck when you start pushing higher boost levels. This kit uses a high-silicon ductile iron to prevent cracking from extreme heat cycles, making it a foundation for any long-term project.
If you are running a larger turbo, you need this to support the added weight and pressure. It is a heavy piece of metal, so grab a friend to help you lift it into place during installation.
- Brand:BD Diesel Performance
- Compatibility:Dodge 2500/3500
- Material:Ductile iron
- Additional Feature:Thick mounting flanges
- Additional Feature:Improved heat expansion tolerance
- Additional Feature:Better flow pathing
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10AN Turbo Drain Upgrade
When you move to a high-performance turbo like an S300 or S400, the oil drain requires a larger diameter fitting to handle the volume of oil. This kit provides the necessary AN fittings to make that transition professional and secure.
This is ideal for builders who want a race-style connection that can be removed quickly if you need to pull the turbo. You will need to ensure your oil pan has the proper tapped hole to accept the 10AN adapter.
- Material:Stainless braided tube
- Fitting Size:10AN
- Additional Feature:Aluminum adapters included
- Additional Feature:High pressure rated line
- Additional Feature:Leak proof seals
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Cummins Crankcase Filter Kit
Your crankcase ventilation system gets neglected far too often during a turbo swap. This kit provides a fresh filter and hose setup to keep oil vapors from clogging up your new intake components.
It is a smart, low-cost preventative measure that keeps the engine bay clean. Just remember to check the hose routing to ensure there are no low spots where oil could pool up and block the flow.
- Compatibility:6.7L Cummins 2007.5-2018
- Package Contents:Filter, hose, bracket
- Additional Feature:Includes mounting clamps
- Additional Feature:Factory style fitment
- Additional Feature:Keeps intake tract clean
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Heater Hose Quick-Delete Kit
The factory quick-disconnect heater fittings are notorious for failing once they get some age on them. This upgrade replaces those plastic clips with a secure AN fitting, ensuring you do not end up stranded by a blown coolant line.
It is highly recommended if you are already tearing down the front of the engine for a turbo swap. You will need a basic wrench set to swap these over, but the peace of mind is well worth the effort.
- Compatibility:6.7L Cummins 2007.5+
- Fitting Size:10AN
- Additional Feature:Quick-disconnect delete
- Additional Feature:Elbow fitting included
- Additional Feature:High temperature seals
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Fleece Coolant Bypass Kit
The rear cylinders on these engines are known to run hot, leading to pressure spikes and potential head gasket failure. This bypass kit promotes even coolant circulation, helping to stabilize temperatures across the entire head.
This is a mandatory upgrade if you are planning to add more fueling and boost. Be prepared for a bit of work, as this kit requires you to tap into the cooling system properly.
- Brand:Fleece Performance
- Compatibility:2013-2018 RAM
- Additional Feature:Complete hardware set
- Additional Feature:Engineered for 6.7L cooling
- Additional Feature:Prevents hot spots
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Tuner Harness Repair Kit
If you have been running a tuner, those factory harness connectors often get loose or corroded over time. This repair kit provides factory-spec plugs to ensure your engine sensors receive a clean signal without any electrical interference.
It is the perfect fix for those annoying intermittent engine codes that seem to pop up after a swap. You will need a decent wire stripper and a crimping tool to ensure a solid connection.
- Compatibility:2013-2024 6.7L Cummins
- Configuration:Harness connector plug
- Additional Feature:Direct fit replacement
- Additional Feature:Resists heat and vibration
- Additional Feature:Solves tuning connection issues
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VGT Turbo Installation Kit
Installing a turbo involves a lot of small gaskets, studs, and spacers that you really should not reuse. This kit bundles everything together, acting as a comprehensive bolt-kit for a smooth install process.
It is best for anyone who wants to avoid multiple trips to the store for missing hardware. Just keep an eye on the torque specs, as you are working with critical seals that need to be seated properly.
- Brand:Fleece Performance
- Compatibility:07.5-18 Cummins
- Package Contents:Full install hardware
- Additional Feature:Black finish hardware
- Additional Feature:Professional grade seals
- Additional Feature:Organized component set
Frequently Asked Questions
Will a 2nd gen swap actually increase my truck's horsepower?
Yes, moving the turbo to the top mount position allows for a much more efficient exhaust path and allows you to run larger, more capable turbochargers. This setup significantly improves throttle response and allows the engine to breathe much better at higher RPMs.
Do I need to upgrade my injectors or tuning when I install this kit?
You should definitely plan on updating your custom tuning to account for the increased airflow and different turbo spool characteristics. If you stick with stock injectors, you might notice a boost in performance, but they will likely become the limiting factor in your build quite quickly.
How much time should I set aside for the installation?
If you have a decent set of tools and a solid understanding of your engine bay, you can expect the process to take an entire weekend. It involves removing the stock manifold, mounting the new turbo, and rerouting various oil and coolant lines, so do not rush the job.
Is it difficult to keep the engine bay clean with a top mount turbo?
The top mount position puts the turbo right in the open, which makes maintenance and visual inspections much easier than the stock location. However, you will need to be diligent about keeping the area clear of debris because the turbo housing gets incredibly hot during operation.
Can I keep my stock exhaust system with these kits?
Most kits provide a transition piece, but you might need to modify your existing exhaust piping to connect to the new downpipe. Be prepared to visit a local exhaust shop or use a custom adapter to ensure everything aligns without creating restrictive bends.
