DOUGS HEADERS D665-B Shorty Steel 694342544232 260 289

( Brand: Dougs Headers ), ( Material: Steel ), ( Seller: Summit Racing Equipment ), ( Header Flange Thickness: 3/8 In. ), ( Header Style: Shorty ), ( Header Finish: High Temperature Black Paint ), ( Header Primary Tube Size: 1 5/8 In. ), ( Header Outlet Diameter: 2.500 In. ), ( Header Port Style: Sap ), ( Primary Tube Gauge: 16-gauge ), ( UPC: 694342544232 ), ( Manufacturer Part Number: D665-B )

Review DOUGS HEADERS Shorty Steel Painted Ford Mercury 260 289 Pair fits 302

Introducing Doug's Headers D665-B Shorty Steel Headers, specifically designed for Ford Mercury models equipped with the 260, 289, or 302 cubic inch engines. These headers are a must-have for those seeking optimal engine performance and impressive exhaust sound.

Crafted from high-quality steel, these headers are built to last. The shorty design provides a more aggressive look, while also reducing exhaust flow length for improved throttle response and power output. The primary tubes are constructed with a 1.625-inch diameter, ensuring adequate flow for your engine.

These Doug's Headers feature a 4-1 collector design, which collects the exhaust gases from each cylinder into a single pipe for efficient exhaust scavenging. The collector is equipped with 4-inch primaries and a 3.5-inch collector, which tapers down to a 1.625-inch merge collector.

One of the significant advantages of these headers is their ability to accommodate stock or aftermarket exhaust systems. The flanges on the headers are designed to fit most popular exhaust systems, providing flexibility for customization and ease of installation.

The Doug's Headers D665-B Shorty Steel Headers not only enhance the performance of your engine but also contribute to a more enjoyable driving experience with their impressive exhaust note. The headers have a polished finish, which not only looks great but also helps protect the metal from corrosion.

Installation of these headers is made easy with the included gaskets and hardware. Doug's Headers offers a step-by-step installation guide to help ensure a smooth process. If you're looking to unlock the full potential of your Ford Mercury's engine, these shorty steel headers are an excellent choice for improved performance and a more engaging driving experience.

Pros and Cons of Buying Doug's Headers D665-B Shorty Steel for Ford Mercury 260, 289, 302

Doug's Headers is a renowned brand in the automotive aftermarket industry, known for manufacturing high-performance exhaust headers. The D665-B Shorty Steel headers are specifically designed for Ford Mercury engines with a displacement of 260, 289, and 302 cubic inches. In this analysis, we will discuss the advantages and disadvantages of investing in these headers.

1. Enhanced Performance: Doug's Headers are designed to improve engine performance by reducing exhaust gas flow restrictions. They provide a smoother, more efficient exhaust path, which can lead to increased horsepower and torque.

2. Superior Quality: Doug's Headers are manufactured using premium materials and precise craftsmanship. The D665-B Shorty Steel headers are built from heavy-duty steel, ensuring durability and long-lasting performance.

3. Improved Engine Sound: The headers deliver a more pleasing exhaust note, which is often preferred by enthusiasts. The enhanced sound quality can be attributed to the improved exhaust flow and the short, straight design of the headers.

4. Easy Installation: The headers come with straightforward installation instructions, making it a relatively simple process for most DIY enthusiasts. Additionally, the headers are designed to fit securely and require minimal modifications.

1. Cost: Doug's Headers are a more expensive option compared to other aftermarket headers. The price difference can be significant, which may deter some potential buyers.

2. Exhaust Manifold Adapters: Depending on the specific engine and exhaust system configuration, additional exhaust manifold adapters might be required for installation. These adapters can add to the overall cost and complexity of the project.

3. Potential for Increased Backpressure: While Doug's Headers are designed to reduce exhaust gas flow restrictions, they can potentially create an increase in backpressure if not properly installed or if used with restrictive exhaust components.

4. Loud Exhaust: The headers can produce a louder exhaust note than stock components. This might not be desirable for those who prefer a quieter ride.

The Doug's Headers D665-B Shorty Steel headers offer significant performance benefits, including improved engine sound, enhanced horsepower and torque, and easier installation. However, they come with a higher price tag and potential complications like the need for exhaust manifold adapters and the risk of increased backpressure. Ultimately, the decision to invest in these headers depends on individual priorities, budget, and desired levels of engine performance.

If you are an enthusiast looking to maximize engine performance and are willing to invest in high-quality components, the Doug's Headers D665-B Shorty Steel headers could be an excellent addition to your Ford Mercury 260, 289, or 302 engine. Ensure that you have a clear understanding of the installation process and potential modifications required before making a purchase. If you are on a tighter budget or prefer a quieter exhaust note, other aftermarket headers may be a more suitable option.

part # d665 prices

• $975.08-$1055.48

specifications maniheader:

• for models: 302
• for makes: Ford, Mercury
• brand: Dougs Headers
• material: Steel
• seller: Summit Racing Equipment
• header flange thickness: 3/8 In.
• header style: Shorty
• header finish: High Temperature Black Paint
• header primary tube size: 1 5/8 In.
• header outlet diameter: 2.500 In.
• header port style: Sap
• primary tube gauge: 16-gauge
• upc: 694342544232
• manufacturer part number: D665-B

offer maniheader:

• started: March 30, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 5

shipping maniheader:

• type: Fixed
• cost: $0.00
• transit: 2-4 Days
• service: Economy
• class: Economy

general maniheader:

• Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
• condition: New

seller maniheader:

• rating: 99.4%
• # reviews: 1142954

returns maniheader:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

payments maniheader:

• other
• wallet: Apple-pay
• credit card: Visa

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