Why settle for stock performance when your engine can breathe so much easier? Swapping to a secondary position mount is the clearest path to real reliability and power gains.
You want parts that fit right the first time so you spend less time in the driveway. Finding the Best 2nd Gen Swap Kit 6.7 Cumminses requires focusing on durability and clean connections. Keep reading to see what makes these components stand out.
Key Takeaways
- Prioritize stainless steel construction for all oil lines to resist high heat and prevent leaks over time.
- Verify that your drain kit includes high flow adapters to ensure the oil returns to the pan without restrictions.
- Choose intake manifolds that eliminate the restrictive grid heater to improve airflow volume and engine efficiency.
- Ensure all silicone boots and clamps are rated for high boost pressures to avoid blowing hoses under load.
- Confirm coolant bypass kits include specific brackets for your exact model year to make installation straightforward.
| Essential Swap Foundation |  |
Universal Stainless Steel Turbo Drain Kit | Braided stainless durability | High flexibility design | Includes necessary connectors | View on Amazon | Read Review |
| Direct Fit Reliability |  |
2003-2018 Cummins Turbo Drain Kit | Wide model compatibility | Secure leak-free seals | Durable construction materials | View on Amazon | Read Review |
| Maximum Airflow Upgrade |  |
Banks Monster-Ram Intake System | Significant airflow increase | Faster turbo spool | Cleaner intake path | View on Amazon | Read Review |
| High Pressure Stability |  |
BST Stainless Intercooler Pipe Kit | Handles high boost | Prevents hose blow-off | Stainless steel longevity | View on Amazon | Read Review |
| Precision Oil Management |  |
S300 S400 Turbo Drain Upgrade | 10AN adapter quality | Heat-resistant shielding | Ideal for larger turbos | View on Amazon | Read Review |
| Cooling System Protection |  |
Fleece Performance Coolant Bypass Kit | Protects rear cylinders | Prevents coolant stagnation | Necessary for performance builds | View on Amazon | Read Review |
| Quick Disconnect Solution |  |
Cummins Heater Hose Fitting Upgrade | Eliminates plastic leaks | Secure threaded connection | Simplifies future maintenance | View on Amazon | Read Review |
| Performance Intake Standard |  |
Banks Monster-Ram Intake Upgrade | Superior air flow | Solid mounting hardware | Clean engine bay look | View on Amazon | Read Review |
| Complete Airflow Solution |  |
Banks Monster-Ram Intake Package | Removes heater bottleneck | Optimized manifold geometry | Reliable performance gain | View on Amazon | Read Review |
| Professional Intake Upgrade |  |
Banks Monster-Ram Intake Assembly | High-volume air delivery | Resists pressure deformation | Quality craftsmanship | View on Amazon | Read Review |
More Details on Our Top Picks
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Universal Stainless Steel Turbo Drain Kit
If you are relocating your turbo, you need a reliable oil return that can handle the new geometry. This kit uses a stainless steel braided line to provide the flexibility required when your turbo is no longer sitting in the stock position.
It is a great choice for builders who want a clean, professional finish without the risk of leaks associated with rubber hoses. Just keep in mind that you may need to trim the line to achieve the perfect tension for your specific turbo orientation.
- Material Type:Stainless steel
- Engine Compatibility:6.7L Cummins
- Connection Style:Threaded fittings
- Additional Feature:Braided for heat resistance
- Additional Feature:Simplifies oil drainage routing
- Additional Feature:Includes mounting hardware
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2003-2018 Cummins Turbo Drain Kit
This kit is tailored for those who want a straightforward installation on a variety of Cummins model years. The construction is focused on leak prevention, which is the most critical factor when moving your oil drain away from the factory path.
You will find this works well for most S300 or S400 setups. Be sure to check your drain flange spacing before you bolt everything down to ensure you maintain a downward gravity feed.
- Engine Compatibility:5.9L and 6.7L Cummins
- Connection Style:Flange to fitting
- Additional Feature:Optimized for turbo swaps
- Additional Feature:Heavy duty hose construction
- Additional Feature:Precise fitment dimensions
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Banks Monster-Ram Intake System
Replacing your restrictive stock intake manifold is one of the most effective ways to increase engine efficiency. This system provides a much larger opening for air, which helps your turbo spool faster and perform under higher boost levels.
The included grid heater delete is a smart touch that cleans up the intake path. Just remember that removing the heater means you should live in a warmer climate or use a block heater during winter months.
- Brand Name:Banks Power
- Engine Compatibility:6.7L Cummins
- Kit Components:Intake manifold and hardware
- Additional Feature:Eliminates intake restriction
- Additional Feature:Improves throttle response
- Additional Feature:Includes grid heater delete
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BST Stainless Intercooler Pipe Kit
You need pipes that can hold up when you start pushing higher boost numbers through your new turbo. This kit replaces factory components that often expand or pop off under extreme pressure.
The stainless steel construction is rigid and durable, ensuring your charge air arrives at the engine without heat soak or leaks. Keep in mind that you will need to tighten the boots carefully to ensure a perfect seal during your initial run.
- Material Type:Stainless steel
- Engine Compatibility:6.7L Cummins
- Kit Components:Pipes and boots
- Additional Feature:Enhanced durability over stock
- Additional Feature:Mirror finish appearance
- Additional Feature:Includes reinforced couplers
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S300 S400 Turbo Drain Upgrade
Managing the oil return for larger aftermarket turbos requires high-quality adapters. This kit features aluminum 10AN adapters that create a secure, professional connection for your S300 or S400 setup.
The braided stainless line adds an extra layer of protection against engine bay heat. Ensure your oil drain hole is clear of debris before installation to keep the flow path unobstructed.
- Material Type:Stainless and Aluminum
- Engine Compatibility:5.9L and 6.7L Cummins
- Connection Style:10AN fittings
- Additional Feature:Designed for S300/S400
- Additional Feature:Leak-resistant hardware
- Additional Feature:Improved flow dynamics
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Fleece Performance Coolant Bypass Kit
When you increase the performance of your engine, you also increase the thermal load. This bypass kit helps manage coolant temperatures by providing a dedicated path for the fluid, protecting your back cylinders from excessive heat.
It is a specialized piece of hardware for high-performance builds. You should set aside an afternoon for the install because it requires draining the cooling system and working in tight quarters.
- Brand Name:Fleece Performance
- Engine Compatibility:6.7L Cummins
- Kit Components:Bypass line and adapter
- Additional Feature:Improves thermal regulation
- Additional Feature:High-grade coolant hose
- Additional Feature:Precision machined fittings
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Cummins Heater Hose Fitting Upgrade
The factory quick-disconnect fittings on the heater hose are notorious for failing at the worst times. This conversion adapter replaces those plastic clips with a secure, threaded connection that you can rely on.
It uses a -10AN fitting to ensure your coolant lines stay exactly where they belong. This is a set-it-and-forget-it upgrade that removes a common point of failure from your engine bay.
- Engine Compatibility:6.7L Cummins
- Kit Components:Adapter, elbow, clamp
- Connection Style:-10AN conversion
- Additional Feature:Quick-disconnect delete
- Additional Feature:Durable metal construction
- Additional Feature:Easy installation process
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Banks Monster-Ram Intake Upgrade
If you are looking for a reliable way to optimize air density, this intake system is a solid contender. It is designed to work in tandem with other performance upgrades to help your engine breathe freely.
The hardware included is top-tier, making the installation process much smoother than using generic parts. Just be prepared to spend some time organizing your workspace to reach the factory mounting bolts.
- Brand Name:Banks Power
- Engine Compatibility:6.7L Cummins
- Kit Components:Intake assembly
- Additional Feature:High flow design
- Additional Feature:Durable finish
- Additional Feature:Improved engine efficiency
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Banks Monster-Ram Intake Package
This package provides a holistic approach to intake management by addressing both the manifold design and the grid heater obstruction. It is designed for the serious builder who wants to maximize the potential of a second-gen swap.
The flow characteristics are significantly better than the restrictive stock unit. Please verify your current tuning requirements before installation, as changing your airflow can impact how your engine runs.
- Brand Name:Banks Power
- Engine Compatibility:6.7L Cummins
- Kit Components:Intake and hardware
- Additional Feature:Increased boost capability
- Additional Feature:Robust construction
- Additional Feature:Direct bolt-on design
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Banks Monster-Ram Intake Assembly
Rounding out the list is another variation of the high-flow intake, perfect for those fine-tuning their forced induction system. It delivers consistent air volume to the cylinders, which is vital when you are running a larger turbocharger.
The unit is built to withstand high-pressure demands without deforming. It is a smart choice for anyone focusing on a long-term, high-performance engine build.
- Brand Name:Banks Power
- Engine Compatibility:6.7L Cummins
- Kit Components:Intake and components
- Additional Feature:Engineered for performance
- Additional Feature:Sturdy metal construction
- Additional Feature:Simplifies airflow path
Frequently Asked Questions
Will a second gen swap improve my fuel economy?
You might see a small gain, but this upgrade is primarily for better airflow and temperature control. By reducing backpressure, the engine works less to push out exhaust gases. Most people notice the biggest difference in throttle response and towing performance rather than miles per gallon. Don't expect a miracle at the pump.
Do I need a custom tune after installing the kit?
Yes, you usually need a custom calibration to account for the change in airflow. The turbo will likely spool differently, and your fueling map needs to adjust to match the new boost characteristics. Running the stock tune can lead to erratic boost spikes or poor driveability. Talk to your tuner before you turn the key for the first time.
Is it difficult to clear the factory AC lines?
Many kits are designed to fit around the factory AC compressor, but it can be a tight squeeze. Some setups might require you to slightly bend or relocate the lines for proper clearance. Double check that the kit specifically mentions AC retention if keeping your air conditioning is a priority. Taking your time during installation prevents damaging these fragile lines.
Can I use this kit with a stock turbocharger?
Most second gen swap kits are designed for aftermarket turbos with a T4 or T3 footprint. The stock VGT turbo on a 6.7 Cummins has a unique mounting style that does not fit these manifolds. You will need to source a compatible fixed-geometry turbo to complete the swap. This is part of why the kit is considered a performance upgrade.
How much time should I set aside for the installation?
Expect to spend a full weekend if you are doing this in your driveway. Removing the factory manifold and turbo can be tedious due to rusted bolts and cramped space. Having a second set of hands makes the process much smoother, especially when lifting the heavy turbo assembly into place. Clear your schedule so you do not have to rush the final steps.
