Ten years ago, a 2nd Gen swap felt like a bespoke engineering project reserved for the most dedicated engine builders. Today, the process is far more organized, thanks to standardized kits that remove the guesswork from your heavy-duty truck build.
Finding the Best 2nd Gen Swap Kit 6.7 Cumminses requires focus on component compatibility and long-term reliability. Proper plumbing and airflow management dictate the lifespan of your charger, so let's check out the essential hardware to get your engine running smoothly.
Key Takeaways
- Prioritize stainless steel braided lines for oil drain and feed kits to prevent premature heat degradation.
- Verify the fitting sizes like -10AN ensure your specific turbo manifold and block ports match correctly.
- Always check that your intake horn kit includes grid heater delete or upgrade options to improve airflow dynamics.
- Select coolant bypass kits that specifically target the 2013 to 2018 model years to avoid interference with factory emissions equipment.
- Inspect every connector and adapter for high-heat resistance, as these small seals often become the first point of failure.
| Essential Fluid Routing |  |
Generic Stainless Turbo Drain Kit | Heat resistant braiding | Durable stainless construction | Secure threaded connectors | View on Amazon | Read Review |
| Reliable Drain Solution |  |
Universal 2nd Gen Drain Kit | Prevents oil back-up | Broad model compatibility | Easy installation process | View on Amazon | Read Review |
| Superior Airflow Upgrade |  |
Banks Monster-Ram Intake System | Increases air density | Removes flow restrictions | Boosts throttle response | View on Amazon | Read Review |
| Aesthetic Performance Piece |  |
Banks Powdercoated Monster-Ram Intake | Professional powdercoated finish | Improved cold starts | High airflow capacity | View on Amazon | Read Review |
| Precision Turbo Routing |  |
S300 S400 Turbo Drain Kit | High volume capacity | Lightweight aluminum adapters | Prevents line abrasion | View on Amazon | Read Review |
| Engine Cooling Stability |  |
Fleece Performance Coolant Bypass | Regulates coolant pressure | Prevents system damage | Specifically engineered fit | View on Amazon | Read Review |
| Hose Connection Simplifier |  |
Heater Hose 10AN Upgrade | Eliminates plastic fail points | Simplifies hose removal | Secure threaded attachment | View on Amazon | Read Review |
| Electronic Connection Repair |  |
Shibby Engineering Tuning Harness | Ensures clean signals | Simple plug-in installation | Protects against vibration | View on Amazon | Read Review |
| Fuel System Reliability |  |
S&S Diesel CP3 Conversion | 50-state legal | Reliable pump operation | Enhanced fuel delivery | View on Amazon | Read Review |
| Bottom End Insurance |  |
Revive Head Gasket Kit | Includes high-strength studs | Complete gasket set | Prevents head lifting | View on Amazon | Read Review |
More Details on Our Top Picks
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Generic Stainless Turbo Drain Kit
If you want a reliable oil path that won't leak under pressure, this kit is your first stop. It uses a stainless steel braided line that resists heat and vibration better than factory rubber hoses.
The connectors are machined to fit tight, which is vital when dealing with high-pressure oil systems. Just keep in mind that you might need to adjust your oil pan mounting point to ensure a gravity-fed drain that stays clear of the new exhaust manifold.
- Component Type:Turbo drain line
- Material Composition:Stainless steel
- Connection Diameter:10AN fittings
- Additional Feature:Includes mounting screws
- Additional Feature:Flexible braided hose
- Additional Feature:Universal fitment for swaps
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Universal 2nd Gen Drain Kit
This kit is tailored for those who want to avoid the common oil pooling issues that plague 2nd Gen swaps. It provides enough length to reach the pan without kinking, which is a common headache during installation.
The hardware is designed for those mid-range S300 and S400 turbo setups. While it works for a wide range of years, verify your oil pan tap location before you finalize your routing to ensure a smooth, downward flow.
- Component Type:Turbo drain tube
- Compatibility Years:2003-2018
- Engine Displacement:5.9L and 6.7L
- Additional Feature:Compatible with most turbos
- Additional Feature:High pressure hose
- Additional Feature:Corrosion resistant finish
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Banks Monster-Ram Intake System
Adding this intake is like clearing a clogged artery in your engine. The Monster-Ram design improves air density and flow, which helps your turbo spool much faster than it would with the stock unit.
The killer grid heater upgrade removes a major restriction in the path to your cylinders. Make sure you have enough room around your fuel lines and sensors because this unit is significantly larger than the stock intake horn.
- Brand Name:Banks Power
- Component Type:Intake manifold
- Engine Displacement:6.7L
- Additional Feature:Killer grid heater included
- Additional Feature:Optimized interior shape
- Additional Feature:Durable aluminum construction
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Banks Powdercoated Monster-Ram Intake
This is essentially the same high-performing intake as the previous option, but with a durable powdercoated finish. It keeps your engine bay looking clean and professional while resisting the harsh under-hood environment.
You still get the benefit of the killer grid heater, which improves cold starts significantly. It is a great choice if you want the performance gains of a high-flow intake without leaving raw metal exposed to the elements.
- Brand Name:Banks Power
- Component Type:Intake manifold
- Engine Displacement:6.7L
- Additional Feature:Corrosion resistant coating
- Additional Feature:Includes heater upgrade
- Additional Feature:Smooth interior casting
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S300 S400 Turbo Drain Kit
When you upgrade to an S300 or S400 turbo, you need a drain kit that handles the higher oil volume. These aluminum 10AN adapters provide a solid, leak-free connection that stays tight under high heat.
The stainless steel braid prevents the line from chafing against your exhaust or engine block. It is a robust solution for anyone pushing their truck beyond stock power levels.
- Component Type:Turbo drain kit
- Material Composition:Aluminum and stainless
- Connection Diameter:10AN
- Additional Feature:Fits S300 series turbos
- Additional Feature:Fits S400 series turbos
- Additional Feature:High heat tolerance
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Fleece Performance Coolant Bypass
If you are worried about coolant pressure spikes when you drive your Cummins hard, this bypass is a smart addition. It helps regulate the pressure and protects your cooling system from rupturing.
The kit is specifically designed for the 2013-2018 chassis, ensuring that you don't run into clearance issues with your accessory drive. Installing this usually requires draining your coolant, so plan to do it during a full cooling system flush.
- Brand Name:Fleece Performance
- Component Type:Coolant bypass
- Compatibility Years:2013-2018
- Engine Displacement:6.7L
- Additional Feature:Protects head gaskets
- Additional Feature:High flow design
- Additional Feature:Direct bolt-on application
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Heater Hose 10AN Upgrade
The factory quick-disconnect fittings are a known weak point that can snap over time. This 10AN conversion adapter replaces that plastic mess with something far more dependable.
It is a simple upgrade that makes removing your heater hoses much easier in the future. Just ensure you use a quality hose clamp to prevent any seeping at the connection point.
- Component Type:Hose adapter
- Compatibility Years:2007.5 and newer
- Engine Displacement:6.7L
- Connection Diameter:10AN
- Additional Feature:Includes elbow fitting
- Additional Feature:Quick-disconnect delete
- Additional Feature:Sturdy metal construction
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Shibby Engineering Tuning Harness
When you perform a 2nd Gen swap, you often need to move or replace your engine sensors. This tuning harness adapter is essential for keeping your electrical connections secure and free from corrosion.
It is designed to bridge the gap for 2013-2024 model years, ensuring your ECU stays happy. If you are dealing with intermittent sensor codes, this is a very cost-effective way to rule out a bad connection.
- Brand Name:Shibby Engineering
- Component Type:Harness adapter
- Compatibility Years:2013-2024
- Engine Displacement:6.7L
- Additional Feature:Tuning adapter repair
- Additional Feature:Weatherproof housing
- Additional Feature:Factory-style connectors
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S&S Diesel CP3 Conversion
Replacing your newer fuel pump with a CP3 conversion kit is a common way to increase the longevity of your fuel system. This kit is 50-state legal, which takes the stress out of your annual inspections.
The pump provides a steady, reliable fuel supply that is far more tolerant of varied fuel quality than stock pumps. It is a significant investment, but it is one of the best ways to future-proof your engine.
- Brand Name:S&S Diesel
- Component Type:CP3 pump
- Compatibility Years:2019-2020
- Engine Displacement:6.7L
- Additional Feature:Complete conversion set
- Additional Feature:High pressure output
- Additional Feature:Bolt-on installation
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Revive Head Gasket Kit
If you are already deep into your 2nd Gen swap, you might as well take care of your head studs and gasket. This set gives you the peace of mind that your top end won't lift when you turn up the boost.
The ARP studs are a industry standard for holding everything together under extreme pressure. While the installation is labor-intensive, it is much easier to do while the engine is already apart for the turbo conversion.
- Component Type:Head gasket kit
- Compatibility Years:2007-2018
- Engine Displacement:6.7L
- Additional Feature:ARP hardware included
- Additional Feature:Comprehensive seal set
- Additional Feature:Ideal for performance builds
Frequently Asked Questions
Will a second gen swap actually improve my fuel economy?
While these kits are built for power, they can improve overall efficiency by reducing backpressure. When your engine breathes easier, it does not have to work as hard to maintain highway speeds. Just remember that your driving habits have a much larger impact on your fuel consumption than the turbo kit itself.
Do I need to upgrade my fuel injectors with this kit?
You should definitely look into larger injectors if you want to see the full potential of your new turbo. A bigger turbo pushes more air, and you need a proportional amount of fuel to create real power. Without enough fuel, you will experience a laggy response that makes your truck feel sluggish.
Is this a weekend project for a home mechanic?
Expect to spend at least a full weekend in the garage if you are tackling this alone. You will be removing the entire exhaust manifold, stock turbo, and coolant lines, which is a labor-intensive process. Having an extra set of hands makes moving the heavy cast parts much safer and faster.
What should I do about my truck's tuning?
You absolutely need a custom tune to match your new air setup. The factory computer settings cannot account for the massive change in airflow, which leads to poor performance or potential engine damage. Reach out to a reputable tuner who has experience with your specific turbo size and injector flow rate.
Can I keep my stock air intake setup?
Most second gen swaps move the turbo location, so your stock intake tube will no longer fit. You will need to purchase a custom intake kit or build one using silicone couplers and piping. Planning for this extra expense upfront saves you a lot of frustration when you realize the old parts just do not reach anymore.
