The Ford Mustang Fox Body platform, produced from 1979 to 1993, remains a popular choice for enthusiasts seeking a classic muscle car experience. One popular modification for boosting performance is the installation of long tube headers. But choosing the right set and understanding the implications can be tricky. This guide will explore everything you need to know about fox body long tube headers.
What are Long Tube Headers?
Long tube headers are exhaust manifolds that extend further down the chassis than shorty headers or stock manifolds. This extended length allows for improved scavenging, a process that helps pull exhaust gases out of the cylinders more efficiently. This leads to several performance benefits, as detailed below.
Benefits of Long Tube Headers on a Fox Body Mustang
- Increased Horsepower and Torque: The primary benefit is a noticeable increase in horsepower and torque, particularly in the mid-to-upper RPM range. This is due to the improved scavenging effect.
- Improved Engine Breathing: The longer tubes allow for a more efficient exhaust flow, leading to better engine breathing and overall performance.
- Enhanced Exhaust Note: Many enthusiasts appreciate the throatier, more aggressive exhaust note that long tube headers produce.
Downsides of Long Tube Headers
- Potential for Reduced Low-End Torque: While long tube headers excel in the upper RPM range, they can sometimes slightly reduce low-end torque. This is less noticeable in some applications and highly dependent on the engine setup.
- Installation Complexity: Installation can be more challenging than shorty headers, often requiring additional modifications or fabrication. This often includes dealing with clearance issues around steering components, floor pans, and suspension.
- Emissions and Legal Compliance: In some regions, long tube headers may not comply with emissions regulations. Check your local laws before installation.
- Increased Noise: The improved exhaust flow typically results in a louder exhaust note. This might be desirable for some, but unwanted for others. Additional mufflers or resonators can help mitigate noise levels.
What Size Long Tube Headers Should I Choose for My Fox Body?
Header tube diameter is a critical consideration. Generally, 1 5/8" primary tubes are a good starting point for naturally aspirated Fox Body Mustangs with moderate modifications. For boosted applications or heavily modified engines, larger 1 ¾" primary tubes might be more suitable. However, larger isn't always better; excessive tube diameter can lead to reduced low-end torque.
How Much Horsepower Will Long Tube Headers Add to My Fox Body?
The horsepower gains from long tube headers vary considerably depending on the engine modifications, other supporting modifications (intake, exhaust, tuning), and the overall condition of the engine. You can typically expect gains anywhere from 10-30 horsepower at the wheels, but this is only an estimate and real-world results may differ.
Are Long Tube Headers Street Legal?
The legality of long tube headers varies significantly by region and even by individual state or municipality. Some areas have stricter emissions standards than others. Check with your local Department of Motor Vehicles (DMV) or equivalent authority for specific regulations in your area. Keep in mind that even if technically legal, they might cause your vehicle to fail an emissions test.
What are Some Popular Brands of Fox Body Long Tube Headers?
Several reputable brands offer long tube headers specifically designed for Fox Body Mustangs. Research and reviews are essential before purchasing. Consider reading user reviews and comparing features to find the best fit for your specific needs and budget.
Do I Need a Tune After Installing Long Tube Headers?
Yes, you absolutely need a professional tune after installing long tube headers. This ensures proper fuel delivery and ignition timing for optimal performance and reliability. Running with headers without a proper tune can lead to engine damage.
This guide provides a comprehensive overview of fox body long tube headers. Remember to research thoroughly and consider all factors before making a purchase and installation. Always consult with experienced mechanics or tuners to ensure proper installation and tuning.
