Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Model: EH28944
Features:
2-bolt flange
Full 1 7/8" Primaries
3" Collector
CNC Machined Flanges
Polished 304 Stainless Steel
Standard Graphite Manifold Gaskets
Professional installation is highly recommended
Installation Instruction is NOT Included
Boost Horsepower, Torque, and Save on Gas with Headers and Exhaust System Modifications!"
Replacing a vehicle’s headers and exhaust is a way to add horsepower and torque, and it will also increase your vehicle’s volume. Want a car that sounds like an American muscle car should? This header will help your vehicle achieve that and it can add up to 10-15 horsepower.
Install an exhaust system means about a 0.5 mpg gas mileage improvement. While that might not sound like much, consider this: If gas costs $3 a gallon and drives this truck 15,000 miles a year, you’re saving yourself about $85 a year on gas. In five years, you’ll have saved nearly enough money to pay for a complete cat-back exhaust system
Exhaust Header VS Manifold, which is the better choice?
The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.
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In addition to purchasing this product, Flashark highly recommends that you purchase Flashark and Spelab's new collaborative product, the silicone coolant hose kit; to replace the stock rubber coolant hose in your car's cooling system.
Are silicone coolant hoses better? Coolant hoses transport the coolant—a mixture of water and antifreeze—from the engine to the radiator and back. The coolant absorbs heat from the engine block and heads and then releases this heat through the radiator, where airflow dissipates it away from the vehicle. This continuous flow is crucial for preventing engine overheating, which can lead to severe damage or failure.
Fitment & Compatibility
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Ford | Mustang | 1979-1993 | Fox Body Chassis; Fits All Factory Standard Trim Levels & Factory Engine Configurations |
| Ford | Mustang | 1994-2004 | SN95 / New Edge Chassis; Equipped with 4.8L / 5.3L V8 Engines |
Q1: Will this exhaust header fit a factory engine in a 1979-2004 Ford Mustang?
A1: No, this exhaust header is specifically engineered for custom GM LS engine swaps (such as 4.8L, 5.3L, LS1, or LSX V8 blocks) into the 1979-2004 Ford Mustang chassis (including Fox Body and SN95/New Edge). It will not fit factory Ford 2.3L, 3.8L, 4.6L, or 5.0L engines. If you are working on a high-performance LS swap Mustang project, these Fox Body LS headers provide the exact fitment and exhaust flow required for your custom conversion build.
Q2: What are the exact dimensions and specs of this exhaust header for 1979-2004 Ford Mustang 4.8L 5.3L?
A2: This Flashark performance header is built with full 1 7/8-inch primaries and a high-flowing 3-inch collector featuring a robust 2-bolt flange. The CNC-machined flanges provide an ultra-flat surface for a warp-free, leak-proof seal against the cylinder head, optimizing exhaust gas velocity and ensuring maximum clearance for your modified V8 setup.
Q3: Does this LS swap header clear the stock steering shaft and K-member on Fox Body and SN95 Mustangs?
A3: This header is meticulously designed to provide optimal clearance for standard LS-swapped Mustang configurations. However, because an engine swap involves tight tolerances within the 1979-2004 Mustang engine bay, utilizing an aftermarket tubular K-member and adjustable LS swap motor mounts is highly recommended to ensure perfect steering shaft and chassis clearance.
Q4: What material is used to construct the Flashark Mustang LS swap exhaust header?
A4: This premium exhaust header for 1979-2004 Ford Mustang 4.8L 5.3L is crafted from high-grade, mandrel-bent 304 stainless steel with a mirror-polished surface finish. Unlike heavy, thick cast-iron factory manifolds, T304 stainless steel is exceptionally lightweight, highly resistant to thermal discoloration and rust, and gives your engine bay a show-quality look.
Q5: How much horsepower and torque can I gain by installing this exhaust header?
A5: Upgrading to the Flashark LS swap exhaust header can boost your performance by an estimated 10 to 15 horsepower and noticeably increase low-end torque. By giving each cylinder its own dedicated 1 7/8" primary tube, it completely eliminates restrictive backpressure, allowing exhaust gases to scavenge efficiently. This results in sharper throttle response and that deep, aggressive American V8 muscle car tone.
Q6: What is included in the package when I order this 1979-2004 Ford Mustang LS swap header?
A6: Your order includes a complete pair of driver-side and passenger-side polished 304 stainless steel exhaust headers, along with standard high-quality graphite manifold gaskets to ensure a tight, durable seal. Please note that specialized swap mounting bolts and hardware should be selected based on your specific LS cylinder head type.
Q7: Is an installation guide included with the Flashark exhaust header for 1979-2004 Ford Mustang 4.8L 5.3L?
A7: No, an installation instruction manual is not included in the kit. Because a custom engine conversion involves complex component relocating, clearance adjustments, and mechanical fabrication, professional installation by an experienced car modification engineering technician or a specialized performance shop is strongly recommended.
Q8: Does this custom LS conversion header feature integrated O2 sensor bungs?
A8: Yes, this exhaust header for 1979-2004 Ford Mustang 4.8L 5.3L includes built-in oxygen (O2) sensor bungs. They are strategically positioned to allow for trouble-free sensor installation and accurate air-fuel ratio readings, making it easy to connect with your standalone LS electronic fuel injection (EFI) wiring harness.
Q9: Why should I choose a Flashark exhaust header over a standard cast iron manifold for my Mustang LS conversion?
A9: Traditional cast iron manifolds are heavy, restrictive, and force exhaust gases from multiple cylinders to collide, creating performance-robbing backpressure. The Flashark 304 stainless steel header uses individual, tuned primary tubes that allow the engine to breathe freely without restriction. This significantly improves exhaust gas scavenging, unlocking hidden horsepower and improving overall engine efficiency.
Q10: Will this header fit larger 5.7L, 6.0L, or 6.2L LS engines swapped into a 1979-2004 Mustang?
A10: Yes, it will! While it is highly optimized as an exhaust header for 1979-2004 Ford Mustang 4.8L 5.3L setups due to standard GSC query frequencies, GM LS-series small-block engines (including LS1, LS2, LS3, LS6, LSX, LQ4, LQ9) share the exact same exhaust port configuration. This means this header will bolt perfectly onto 5.7L, 6.0L, or 6.2L LS-based blocks being swapped into a Fox Body or SN95 chassis.
Q11: Can this performance header help improve my vehicle's fuel economy?
A11: Yes. By drastically reducing exhaust restriction and minimizing engine pumping losses, the Flashark exhaust header helps your LS engine run more efficiently. Under steady cruising conditions, you can see a fuel mileage improvement of up to 0.5 MPG, which translates to direct gas savings over time, helping the headers pay for themselves during long-term use.
Q12: How does Flashark ensure the longevity and structural integrity of this product under racing conditions?
A12: Every Flashark exhaust header is manufactured under strict ISO9001:2000 certification guidelines. Featuring precise TIG welding, heavy-duty CNC-machined head flanges, and resilient T304 stainless steel construction, these headers are engineered to withstand extreme exhaust gas temperatures and high-RPM vibrations, ensuring long-lasting durability for track days and daily street driving alike.