FORD TRUCK 679-011 Left Turbocharger Exhaust Up Pipe Dorman 331.FD8M07 Kit

( Brand: Ford Truck ), ( Manufacturer Part Number: 679-011 ), ( Conditions Options: Ford Super Duty Left Turbo ), ( Genuine Oem: Yes ), ( Ipn: 331.fd8m07 ), ( Descriptionpartcondition: This Is An After-market By Dorman Part 679-011. Missing One Nut ), ( Manufacturer Warranty: 6 Month ), ( Type: Exhaust )

Review FORD TRUCK Super Duty Left Turbocharger Exhaust Up Pipe Kit Dorman fits F250SD 2005–2007

The **Ford 679-011 Turbocharger Exhaust Up-Pipe Kit (2005-2007, Left Side)** from **Dorman** is a high-quality, direct-fit replacement designed to restore optimal performance and reliability to the turbocharger exhaust system on select Ford vehicles equipped with the **3.7L Duratec V6 engine** (commonly found in models like the **Ford Fusion, Mercury Milan, and Mazda5**). This meticulously engineered kit replaces the factory-curved exhaust up-pipe, which can degrade over time due to heat, corrosion, or mechanical stress, leading to leaks, reduced turbo efficiency, or even catastrophic failure. Crafted from **high-grade stainless steel**, the Dorman kit ensures durability and resistance to warping, rust, and thermal expansion, making it a long-lasting solution for enthusiasts and mechanics alike. The design maintains the precise contour and fitment of the original component, ensuring seamless integration with the turbocharger housing, downpipe, and catalytic converter while minimizing backpressure for improved exhaust flow. Whether addressing a worn-out OEM part, upgrading for better performance, or addressing a specific issue like a **turbo lag** or **exhaust leak**, this kit provides a straightforward, cost-effective upgrade that adheres to Ford s factory specifications. Ideal for both DIY installers and professional shops, the Dorman 679-011 kit comes with all necessary hardware and gaskets, simplifying the installation process and reducing the risk of improper sealing or misalignment. With its reputation for quality and compatibility, this exhaust up-pipe kit is a trusted choice for maintaining or enhancing the performance of Ford s turbocharged V6 applications.

The **Ford 679-011 Turbocharger Exhaust Up-Pipe Kit (Dorman)** is a popular aftermarket modification for the **2005-2007 Ford Mustang GT with the 4.6L Coyote engine**. Below is a detailed breakdown of its pros, cons, and a final recommendation.

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### **Pros of the 679-011 Up-Pipe Kit**

1. **Improved Exhaust Flow** The stock exhaust system on the Coyote engine is restrictive, especially in the up-pipes. The Dorman kit replaces the factory stainless steel up-pipes with larger-diameter, high-flow alternatives, reducing backpressure and allowing more exhaust gases to escape. This can lead to better engine breathing, especially under load.

2. **Enhanced Engine Performance** With reduced restriction, the engine can make more power, particularly in the mid-range RPM band. Many drivers report noticeable gains in horsepower and torque, though the exact increase depends on other modifications (e.g., tune, intake, headers).

3. **Better Exhaust Note** The kit provides a deeper, more aggressive exhaust tone compared to the stock system, which some enthusiasts prefer for the sound of a more aggressive engine.

4. **Durability and Quality** Dorman is a well-regarded aftermarket brand known for producing reliable, high-quality parts. The 679-011 kit is made from stainless steel, which resists corrosion better than some cheaper alternatives.

5. **Compatibility** The kit is designed specifically for the **2005-2007 Mustang GT Coyote**, ensuring a proper fit without major modifications required.

6. **Ease of Installation** While not a plug-and-play job, the kit is relatively straightforward to install, especially for those with basic mechanical experience. It typically requires removing the stock up-pipes, installing the new ones, and sealing any gaskets.

7. **Cost-Effective Upgrade** Compared to full exhaust systems or header upgrades, the up-pipes are a relatively inexpensive way to improve exhaust flow and performance.

---

### **Cons of the 679-011 Up-Pipe Kit**

1. **Minimal Power Gains Without a Tune** While the kit improves exhaust flow, the Coyote engine is already well-tuned by Ford. Without a **standalone ECU tune (e.g., from Haltech, Link, or AEM)**, the gains will be modest often in the range of **5-15 horsepower**. A tune is necessary to fully realize the potential of the up-pipes.

2. **No Major Throttle Response Improvement** Unlike headers or a full exhaust system, up-pipes alone do not significantly improve low-end torque or throttle response. They work best in conjunction with other modifications.

3. **Potential for Increased Exhaust Temperatures** Removing restriction can lead to slightly higher exhaust temperatures, which may affect catalytic converter longevity if the system is not properly balanced with other mods.

4. **Sound Can Be Too Loud for Some** While many prefer the deeper tone, others may find the exhaust note too aggressive, especially in stock conditions. This is subjective but worth considering if you value a quieter street sound.

5. **No Direct Horsepower Increase Without Supporting Mods** The Coyote engine is already well-supported by Ford, and up-pipes alone will not unlock significant power gains unless paired with a tune, intake, headers, or other performance upgrades.

6. **Installation Can Be Messy** The stock up-pipes are welded in place, and removing them may require cutting or grinding. While not extremely difficult, it can be a bit of a hassle, especially for beginners.

7. **Limited Longevity Without Upgrades** If you plan to push the engine hard (e.g., with forced induction or high RPMs), the stock headers and catalytic converters may become bottlenecks. Up-pipes alone won t address these issues.

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### **Final Conclusion**

The **Ford 679-011 Dorman up-pipe kit** is a **solid, cost-effective first step** for improving exhaust flow and engine performance on the **2005-2007 Mustang GT Coyote**. It is particularly beneficial if you are planning further modifications (e.g., a tune, headers, or forced induction) because it reduces restriction early in the exhaust system.

However, **it is not a standalone power upgrade** expect only modest gains unless paired with a tune. If your primary goal is **better exhaust flow, a deeper sound, and a foundation for future mods**, this kit is a worthwhile investment. If you are looking for **significant horsepower increases**, you will need to combine it with other upgrades (e.g., headers, a tune, or an intake).

---

### **Recommendation**

- You want a **simple, affordable way to improve exhaust flow** before adding headers or a full exhaust.

- You plan to **add a tune or other performance mods** (e.g., intake, headers, ECU flash).

- You prefer a **deeper exhaust note** over the stock system.

- You are comfortable with a **minor DIY installation** (though professional help may be needed for the first removal).

- You are **not planning any other modifications** and want **significant power gains** in that case, consider **headers or a full exhaust system first**.

- You **dislike loud exhaust notes** and prefer a quieter street sound.

- You are **not willing to invest in a tune**, as the power gains will be minimal otherwise.

- A **standalone ECU tune** (e.g., Haltech, Link, or AEM) for noticeable performance improvements.

- **Headers** (if you want more aggressive gains).

- A **high-flow intake** (e.g., K&N or SP International) for better air flow.

- A **catalytic converter delete or high-flow cat** (if you plan to push the engine hard).

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### **Final Verdict**

The **679-011 Dorman up-pipe kit is a smart, budget-friendly choice** for Coyote enthusiasts who want to **lay the groundwork for future performance upgrades**. While it won t dramatically increase power on its own, it is a **practical first step** toward a more aggressive exhaust system. If you are serious about modifying your Mustang, this kit is a **good investment**, but it should be part of a **larger performance plan** rather than a standalone upgrade.

Details:

2005 - 2007 Ford Super Duty Left Turbocharger Exhaust Up Pipe Kit Dorman 679-011 This is an AFTER-MARKET by part #679-011. Standard Warranty. Missing one nut from full kit.

part #: 679011 prices

• $69.97-$255.95

specifications emissyste:

• for models: F250sd
• for makes: Ford
• for years: 2005-2007
• brand: Ford Truck
• mpn: 679-011
• conditions options: Ford Super Duty Left Turbo
• genuine oem: Yes
• ipn: 331.fd8m07
• descriptionpartcondition: This Is An After-market By Dorman Part 679-011. Missing One Nut
• manufacturer warranty: 6 Month
• type: Exhaust

offer emissyste:

• started: February 12, 2026
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home

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• transit: 5-11 Days
• type: Fixed
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• cost: $0.00
• carrier: UPS
• class: Standard

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returns emissyste:

• time: 30 Days
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seller emissyste:

• city: Grants Pass, Oregon
• # reviews: 5420
• rating: 99.7%

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Exhaust System Kits
• condition: Used

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