Headers for 1978–1979 Ford Bronco 4WD – 5.8L / 6.6L V8 (351M / 400M) Flashark

Roll over image to zoom in Click on image to zoom

Long Tube Headers for 1977-1979 Ford Bronco F100 F150 F250 351M/400M 5.8L/6.6L V8 4WD

Name: Long Tube Headers for 1977-1979 Ford Bronco F100 F150 F250 351M/400M 5.8L/6.6L V8 4WD
Brand: Flashark
SKU: FLES08376
Price: 189.99 USD
Availability: InStock
Rating: 5.0 (12 reviews)

SKU: FLES08376

⚽️Soccer Season Super Deal

Save $200.00

$189.99Limited Time Deal $389.99

Quantity:

Flashark Long Tube Headers for 1977-1979 Ford Bronco F100 F150 F250 351M/400M 5.8L/6.6L V8 4WD

Boost your performance with Flashark Long Tube Headers, designed for 1977-1979 Ford Broncos and F-Series trucks with 351M/400M V8 engines. Crafted from high-quality stainless steel, these headers optimize exhaust flow, reduce backpressure, and increase horsepower and throttle response. The precision-tuned long tube design enhances scavenging, while the mirror-polished finish adds durability and style. With 5/16 machined flanges and all necessary installation hardware included, upgrading your exhaust system has never been easier.

Details:

Standard Uncoated Headers: 1-5/8 in.
Tube Dia: FULL-LENGTH Design
Primary Tube Diameter (in):1.625
Tubes Tube Diameter:1-5/8 in
Reducer Outlet Size: 2-1/2 In.
Collector Diameter: 3 In.
Collector Size: 3 In.

Specifications:

Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Long Tube Headers
Surface: Mirror Polish
Model: EH28225
Material: Stainless Steel

Features:

Tuned-length primary tubes for maximum exhaust scavenging and velocity
Mandrel-bent tubing for smooth exhaust flow
Long transition collector for decreased back pressure
5/16 machined flanges for a perfect seal
Industry™s best welds for durability
Designed for optimal performance
All necessary hardware included for a complete installation

Exhaust Header for 1977-1979 Ford Bronco F100 F150 F250 F350 4WD 351M/400M 5.8L 6.6L

1977-1979 Ford 351M/400M Exhaust Header Parameter Details

1977-1979 Ford 351M/400M Exhaust Header Advantages

1977-1979 Ford 351M/400M Exhaust Header Applicable Models

Long Tube Headers vs. Manifold: Why Headers Are the Best Upgrade for Your 351M/400M V8

The key difference between long tube headers and manifolds lies in both material and performance. Headers, made from lightweight, high-quality steel, are designed to optimize exhaust flow. Unlike thick iron manifolds, long tube headers feature longer, individual tubes for each cylinder, which helps eliminate back pressure. This results in increased horsepower and improved engine efficiency.

Upgrading to Flashark Long Tube Headers will enhance your Ford Bronco or F-Series truck’s engine performance and exhaust sound. Designed for 351M/400M V8 engines, these headers are engineered for maximum power with an easy, direct bolt-on installation—no modifications needed, whether you're on daily drives or off-road adventures.

Why Choose Our Natural Stainless Steel Long Tube Headers Over Black-Coated Alternatives?

While some competitors offer black-coated headers for a "stealth" look, our untreated stainless steel 351M/400M headers provide superior durability and long-term performance without compromises.

No Peeling or Fading – Black coatings often chip, flake, or discolor under extreme heat, leaving a patchy, worn appearance. Our bare stainless steel maintains its integrity for years, resisting corrosion and wear.
Better Heat Dissipation – Coatings can trap heat, reducing efficiency. Unpainted stainless steel allows optimal thermal transfer, helping your engine run cooler.
Zero Maintenance – Unlike coated headers that require touch-ups, our stainless steel finish stays clean with minimal care—no worries about scratched paint or rust spots.
Proven Material Quality – High-grade 304 stainless steel naturally resists oxidation, so it won’t degrade like cheap painted alternatives.

Fitment & Compatibility

⚠️ CRITICAL FITMENT RULES (MUST READ FIRST)

For factory-original vehicles ONLY.

Exclusively fits Ford models factory-equipped with 351M (5.8L) / 400M (6.6L) V8 engines ONLY
Mandatory Fitment: 1977-1979 F-100/F-150 & 1978-1979 F-250 fits 4WD models ONLY
Critical Install Note: Modification to the stock exhaust system is required to retain the catalytic converter

✅ Verified Fitment

Brand	Model	Year Range	Full Compatible Specs
Ford	Bronco	1978-1979	351M (5.8L) / 400M (6.6L) V8 Engine
Ford	F-100	1977-1979	351M (5.8L) / 400M (6.6L) V8 Engine, 4WD ONLY
Ford	F-150	1977-1979	351M (5.8L) / 400M (6.6L) V8 Engine, 4WD ONLY
Ford	F-250	1978-1979	351M (5.8L) / 400M (6.6L) V8 Engine, 4WD ONLY

❌ WILL NOT FIT

Non-351M/400M V8 engine configurations
2WD variants of F-100/F-150/F-250
Vehicles with Dana 60 front differential
F-250 High Boy models

FAQ: 1977-1979 Ford Bronco & F-Series 351M/400M Long Tube Headers

Q1: Will these long tube headers fit my 1977-1979 Ford Bronco or F-Series 4WD truck?

A1: Yes! These Flashark long tube headers are specifically designed for 1977-1979 Ford Bronco, F100, F150, and F250 4WD models equipped with the 351M (5.8L) or 400M (6.6L) V8 engines. They are engineered to properly clear the 4WD front driveshaft and suspension components.

Q2: What performance gains can I expect on my 351M/400M V8 engine?

A2: Factory cast-iron manifolds are highly restrictive on these classic engines. By installing these tuned-length long tube headers, you significantly reduce backpressure and maximize exhaust scavenging. You can expect a noticeable boost of 15-25 horsepower and improved low-end torque, which is perfect for towing, off-roading, or daily cruising.

Q3: Why should I choose bare stainless steel over black-coated headers?

A3: Black-coated headers often chip, flake, and rust quickly under extreme exhaust heat, leaving a terrible appearance. Our premium stainless steel headers maintain their structural integrity and mirror-polished finish for years. They naturally resist corrosion, offer better heat dissipation for a cooler engine bay, and require zero touch-up maintenance.

Q4: Will these headers fix the common exhaust manifold leak or "tick" noise?

A4: Absolutely. The heavy factory cast-iron manifolds are notorious for warping, cracking, and breaking bolts over time, causing annoying exhaust leaks. Flashark headers feature thick 5/16-inch machined flanges that provide a perfectly flat, warp-resistant sealing surface, permanently solving the "Hemi tick" equivalent on your classic Ford.

Q5: How will these headers change the exhaust sound of my Ford truck?

A5: Upgrading to full-length headers will completely transform your exhaust note. The 1-5/8 inch mandrel-bent primary tubes smooth out the exhaust pulses, eliminating the "tinny" sound of stock manifolds and delivering a deep, aggressive, and muscular classic American V8 rumble.

Q6: Are these headers compatible with my manual or automatic transmission?

A6: Yes, these headers are designed with the necessary clearance to accommodate the most common factory transmissions found in 1977-1979 Ford 4WD trucks, including the C6 automatic and heavy-duty manual gearboxes like the NP435.

Q7: Do I need to buy extra hardware or gaskets to install this kit?

A7: No extra hardware is needed to mount them to the engine! The Flashark header kit comes complete with premium exhaust gaskets, header bolts, and 3-inch to 2-1/2-inch reducers, making your installation process as smooth and straightforward as possible.

Q8: Will I need to relocate my starter or oil filter for clearance?

A8: In the vast majority of 1977-1979 Ford 4WD setups with the 351M/400M, these headers are designed to route around the factory starter and oil filter locations. While tight, it typically does not require relocation, though using a modern mini-starter can make installation even easier.

Q9: Why are 1-5/8" primary tubes and 3" collectors best for my build?

A9: The 1-5/8" primary tube diameter is the "sweet spot" for 351M and 400M engines. It maintains high exhaust gas velocity for excellent low-end to mid-range torque (crucial for heavy 4WD trucks), while the 3" long transition collectors ensure there is zero restriction at higher RPMs.

Q10: Are these headers direct bolt-on, or is welding required?

A10: The headers themselves bolt directly to your cylinder heads without any modifications. However, because these are full-length headers, you will need to tie the included 2-1/2 inch reducers into your existing exhaust piping. Depending on your current setup, this may require minor cutting and welding at the mid-pipe connection.

Q11: Can I install these headers on a 2WD Ford F100 or F150?

A11: This specific model (EH28225) is precision-engineered specifically to clear the front driveshaft, crossmember, and suspension geometry of 4WD models. Fitment on a 2WD chassis is not guaranteed, as 2WD trucks have different engine cradle and steering box clearances.

Q12: Will installing these headers throw off my engine's tuning?

A12: Since 1977-1979 Ford trucks use carbureted engines without oxygen sensors or complex ECUs, you won't get any check engine lights. However, because you are drastically improving engine airflow, you may want to slightly enrich your carburetor's air/fuel mixture to take full advantage of the newly unlocked horsepower.