Flashark Long Tube Headers for 2011-2014 Mustang GT 5.0L
A freer-flowing exhaust path and a stronger V8 tone can make a naturally aspirated Mustang feel more responsive and engaging through the rev range. These Flashark long tube headers are designed for listed 2011–2014 Ford Mustang GT models equipped with the 5.0L 302 Coyote V8.
The stainless steel header set uses 1.75-inch primary tubes and 2.50-inch collectors in a mirror-polished finish. It is intended for performance-oriented exhaust builds where the owner understands that long-tube installation can affect mid-pipe fitment, sound level, oxygen-sensor operation, tuning needs, and emissions compliance.
Specifications
| Product Type | Long Tube Exhaust Headers |
|---|---|
| Fitment Type | Performance / Custom |
| Material | Stainless Steel |
| Surface Finish | Mirror Polish |
| Primary Tube Diameter | 1.75 in |
| Collector Size | 2.50 in |
| Placement | Front / Engine Exhaust Ports |
| Brand | FLASHARK |
| SKU | FLES08233 |
| Product Model | EH28106 (ES08233) |
Key Features
- Long-tube layout intended to reduce restriction compared with the factory exhaust-manifold path
- 1.75-inch primary tubes leading into 2.50-inch collectors
- Stainless steel construction with a mirror-polished surface
- Designed for listed 2011–2014 Mustang GT 5.0L Coyote applications
- Supports a deeper, louder exhaust character when combined with the rest of the exhaust system
- Suitable for performance-oriented builds that account for mid-pipe, oxygen-sensor, tuning, and emissions requirements
Built for Better Flow and a Stronger V8 Tone
Long tube headers give each cylinder a longer exhaust path before the primary tubes merge at the collector. On the naturally aspirated 5.0L Coyote platform, this layout is used to reduce exhaust restriction and support smoother exhaust movement through the upper rpm range.
The final sound depends on the mid-pipe, catalytic converters, resonators, mufflers, pipe diameter, and tune. Compared with the factory manifold arrangement, long tube headers generally make the exhaust louder and more pronounced. Some combinations can also add rasp or cabin drone, especially when paired with an aggressive cat-back or a less-restricted mid-pipe.
Actual horsepower and torque results vary with the complete exhaust configuration, calibration, fuel, engine condition, and installation quality.
Factory Manifolds vs. Long Tube Headers
| Area | Factory Manifold Layout | Flashark Long Tube Layout |
|---|---|---|
| Exhaust Path | Compact factory routing | Longer individual primary tubes |
| Primary Size | Factory specification | 1.75-inch tubes |
| Collector | Factory connection layout | 2.50-inch collector |
| Sound | Quieter factory character | Deeper and more pronounced V8 tone; final result depends on the full exhaust system |
| Installation | Original vehicle configuration | More involved installation with mid-pipe and clearance considerations |
What Is Included
- One complete header set
- Header gaskets
- Installation bolts
Inspect all sealing surfaces and hardware before installation. Correct alignment, an even tightening sequence, and a leak check after the first heat cycles help reduce the risk of exhaust leaks.
Installation Notes
- Professional installation is recommended because access around the 5.0L Coyote engine is limited.
- Compare the 2.50-inch collector connection with the vehicle’s mid-pipe before disassembly.
- An existing aftermarket X-pipe, H-pipe, or cat-back does not automatically establish collector compatibility.
- Check oxygen-sensor routing and wiring clearance throughout the full range of engine movement.
- Keep wiring, hoses, steering components, and heat-sensitive parts away from the header tubes.
- Use an even tightening sequence and inspect for exhaust leaks after the first complete heat cycles.
- A calibration review may be appropriate when the header installation changes oxygen-sensor location, catalytic-converter configuration, or the rest of the intake and exhaust setup.
Who These Headers Are Best For
These headers are best suited to 2011–2014 Mustang GT 5.0L owners building a more performance-focused exhaust system and looking for a stronger exhaust note, reduced restriction, and better pull through the upper rpm range.
They are not the right choice for a 3.7L V6, a vehicle outside the listed years, or an owner who needs a quiet factory-style replacement. They may also be unsuitable for vehicles that must retain an unchanged factory emissions configuration or pass local inspections without additional compliance work.
Emissions and Street-Use Notice
Long tube header installation can affect catalytic-converter placement, oxygen-sensor operation, diagnostic readiness, and emissions compliance. Do not assume this product is legal for public-road use in every state or region.
Review local emissions rules and the planned mid-pipe configuration before ordering. A check-engine light or incomplete emissions monitors can occur with some exhaust and calibration combinations.
Related Mustang Exhaust Parts
Browse additional performance exhaust headers. Owners of a 2011–2017 Mustang equipped with the 3.7L V6 should use the separate Mustang 3.7L V6 header listing instead of this 5.0L GT kit.
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.
Fitment & Compatibility
Vehicle Fitment
| Year | Make | Model | Engine | Platform | Full Compatible Specs |
|---|---|---|---|---|---|
| 2011 | Ford | Mustang GT | 5.0L 302 Coyote V8 | S197 | All factory Coupe/Convertible body styles |
| 2012 | Ford | Mustang GT | 5.0L 302 Coyote V8 | S197 | All factory Coupe/Convertible body styles |
| 2013 | Ford | Mustang GT | 5.0L 302 Coyote V8 | S197 | All factory Coupe/Convertible body styles |
| 2014 | Ford | Mustang GT | 5.0L 302 Coyote V8 | S197 | All factory Coupe/Convertible body styles |
- Non-GT trim level Mustang models
- Non-S197 chassis Mustang models
- Engine-swapped or heavily modified vehicles
2011-2014 Mustang GT 5.0L Long Tube Header FAQs
Q1: Will these headers fit a 2011 Mustang GT 5.0L?
A1: Yes. The listed application includes the 2011 Ford Mustang GT with the 5.0L 302 Coyote V8. Existing engine swaps or major exhaust changes can affect installation.
Q2: Will they fit 2012, 2013, and 2014 Mustang GT models?
A2: The listed fitment covers 2012, 2013, and 2014 Mustang GT models equipped with the 5.0L Coyote V8 on the S197 platform.
Q3: Will these long tube headers fit a 3.7L V6 Mustang?
A3: No. This kit is designed for the 5.0L V8 Mustang GT and should not be ordered for a 3.7L V6 model.
Q4: Will they connect to the factory mid-pipe?
A4: Long tube headers change the exhaust connection point compared with the factory manifold layout. Compare the 2.50-inch collectors with the planned mid-pipe before ordering. Connection pipes or fabrication can be required for some systems.
Q5: Can I use these headers with an aftermarket X-pipe or H-pipe?
A5: Compatibility depends on the header collector position, pipe diameter, flange or slip-joint design, and the specific X-pipe or H-pipe. Matching vehicle years or pipe diameter alone does not guarantee that two parts will connect.
Q6: Will long tube headers change the exhaust sound?
A6: Yes. Long tube headers generally create a louder, deeper, and more pronounced V8 exhaust note. The amount of rasp, drone, and overall volume depends on the catalytic converters, mid-pipe, resonators, mufflers, and cat-back system.
Q7: How much horsepower will these headers add?
A7: The result depends on the full exhaust system, calibration, fuel, engine condition, and installation quality. A product-specific before-and-after dyno test is the most reliable way to measure the gain on a particular Mustang.
Q8: Is a tune required after installation?
A8: Tune requirements depend on oxygen-sensor location, catalytic-converter configuration, and the other intake or exhaust modifications on the car. Have the complete setup reviewed by a tuner familiar with the 2011–2014 5.0L Coyote platform.
Q9: Will the headers cause a check-engine light?
A9: A check-engine light is possible when oxygen-sensor position, catalyst operation, wiring, or calibration changes. Do not assume that any long tube header installation will remain free of diagnostic codes.
Q10: Are these headers emissions compliant or street legal?
A10: Emissions rules vary by location and by the final exhaust configuration. Check local regulations before ordering, especially when the installation changes catalytic-converter placement or oxygen-sensor operation.
Q11: What comes with the header set?
A11: The package includes one header set, header gaskets, and installation bolts. Compare the complete exhaust plan before installation so any required connection components can be prepared separately.
Q12: Can these headers be installed at home?
A12: Installation is more involved than an axle-back or cat-back change because access around the Coyote engine is limited. Proper lifting equipment, suitable tools, exhaust-alignment experience, and a safe workspace are important. Professional installation is recommended for most owners.
Q13: How can exhaust leaks be prevented?
A13: Clean the sealing surfaces, position the gaskets correctly, tighten the fasteners evenly, align the downstream exhaust without placing stress on the collectors, and inspect the system again after the first complete heat cycles.
Q14: Who should not buy this header kit?
A14: Do not order this kit for a 3.7L V6, a model outside the listed years, or a vehicle that requires an unchanged factory exhaust and emissions configuration. It is also a poor match for owners who want factory-level sound or are unwilling to address mid-pipe, tuning, CEL, or inspection considerations.
Q15: Are “Flashshark headers” and Flashark headers the same product?
A15: FLASHARK is the brand name shown on this product. “Flashshark” and “Flash Shark” are common alternate spellings used when referring to Flashark headers. Match SKU FLES08233 when identifying this 2011–2014 Mustang GT 5.0L kit.