The 6.7 Power Stroke engine, a powerhouse found in Ford Super Duty trucks, is known for its robust performance. However, many owners seek to enhance this performance further, and one popular modification is a 5-inch turbo-back exhaust system. This upgrade promises significant gains in horsepower, torque, and overall driving experience. This guide delves into the intricacies of a 6.7 Power Stroke 5-inch turbo-back exhaust, exploring its benefits, drawbacks, and considerations before purchasing.
What is a 5-Inch Turbo-Back Exhaust System?
A turbo-back exhaust system replaces all the exhaust components from the turbocharger outlet back to the tailpipe. A 5-inch system, as the name suggests, utilizes 5-inch diameter piping throughout this entire length. This larger diameter compared to the stock exhaust significantly reduces exhaust gas restriction, allowing for improved engine breathing and increased performance.
Benefits of a 5-Inch Turbo-Back Exhaust on a 6.7 Power Stroke
The advantages of upgrading to a 5-inch turbo-back exhaust are substantial:
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Increased Horsepower and Torque: The reduced backpressure translates directly into more horsepower and torque throughout the engine's rev range. This leads to a more responsive and powerful driving experience, especially noticeable during towing and hauling.
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Improved Fuel Economy (Potentially): While not guaranteed, a less restrictive exhaust system can, in some cases, lead to minor improvements in fuel economy, particularly at cruising speeds. This is because the engine works less hard to expel exhaust gases.
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Enhanced Engine Sound: Many owners appreciate the deeper, more aggressive exhaust note that a larger diameter system produces. The sound is a matter of personal preference, but it's a significant factor for many buyers.
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Reduced Exhaust Gas Temperatures (EGTs): Lower EGTs are beneficial for engine longevity and performance, particularly under heavy loads. This reduction in temperature minimizes the risk of engine damage.
Drawbacks of a 5-Inch Turbo-Back Exhaust on a 6.7 Power Stroke
While the benefits are compelling, there are some potential drawbacks to consider:
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Increased Drone: The larger diameter pipe can sometimes lead to a noticeable "drone" at certain RPMs, particularly on highway driving. This is a common complaint and can be mitigated with careful system design and selection.
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Higher Cost: 5-inch turbo-back exhaust systems are generally more expensive than smaller diameter systems. The larger piping requires more material and often more complex fabrication.
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Potential for Increased Particulate Matter: While not always the case, a larger exhaust can, in some situations, increase the amount of particulate matter emitted. This should be considered if emissions regulations are a concern.
What are the Different Types of 5-Inch Turbo-Back Exhaust Systems?
Several types of 5-inch turbo-back exhaust systems are available, each with its characteristics:
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Aluminized Steel: A cost-effective option, offering good durability but potentially susceptible to rust over time.
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Stainless Steel: More expensive but provides superior corrosion resistance and longevity.
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Different Muffler Options: Many manufacturers offer a variety of muffler options, ranging from aggressive, loud setups to more subdued, quieter systems. Consider your preference for sound levels when making your selection.
How Much Does a 5-Inch Turbo-Back Exhaust Cost?
The cost of a 5-inch turbo-back exhaust system varies widely depending on the brand, materials, and features. Expect to pay anywhere from a few thousand dollars to significantly more for high-end systems.
What are the Legal Considerations?
Before purchasing and installing any exhaust system modification, it's crucial to check your local and state regulations regarding exhaust noise levels and emissions. Some modifications may not be street legal in certain areas.
Will a 5-inch Turbo-Back Exhaust Void My Warranty?
Modifying your exhaust system may void parts of your vehicle's warranty, particularly those related to the engine and emissions systems. Always consult your vehicle's warranty documentation and your dealer before making modifications.
Conclusion
A 5-inch turbo-back exhaust system can significantly enhance the performance of your 6.7 Power Stroke engine. However, careful consideration of the potential drawbacks, costs, and legal implications is essential. Weighing the benefits against the potential downsides will help you determine if this modification is the right choice for your truck and driving style. Remember to research reputable manufacturers and installers to ensure a quality installation and optimal performance.
