DOUGS HEADERS D590-SS Collector 694342555115 68-72 326-455 3/4

( Brand: Dougs Headers ), ( Items Included: Gasket, Mounting Hardware ), ( Color: Black ), ( Manufacturer Part Number: D590-SS ), ( Material: Stainless Steel ), ( Vintage Part: No ), ( Type: Exhaust Header ), ( Manufacturer Warranty: 1 Year ), ( Surface Finish: 304 Stainless ), ( Features: Bare ), ( Performance Part: Yes ), ( UPC: 694342555115 )

Review DOUGS HEADERS Stainless 68-72 3/4 Inch Primary Collector fits GTO

Doug's Headers is a renowned manufacturer of high-performance exhaust headers for various classic muscle cars, and their D590-SS 68-72 GTO 326-455 3/4 collector headers are no exception. These headers are engineered specifically for 1968 to 1972 Pontiac GTO vehicles powered by the 326-455 cubic inch engines.

The D590-SS headers are constructed from premium 304 stainless steel, ensuring both durability and longevity. Each header is meticulously designed to maximize exhaust flow for optimal engine performance. The 3/4 collector design allows for increased exhaust velocity, resulting in a more efficient combustion process and enhanced power output.

Featuring a 6-bolt design, the Doug's Headers D590-SS headers ensure a secure connection to the vehicle's engine. The collector has a 4.025-inch primary tube diameter, allowing for a smooth transition from the engine cylinders to the exhaust system. The primary tubes then merge into a single, 2.5-inch collector that's designed to fit seamlessly into the factory exhaust system.

The Doug's Headers D590-SS headers are not only designed to provide top-tier performance but also to maintain a balanced exhaust flow between cylinders. Properly balanced exhaust gases contribute to reduced turbulence and unwanted pressure waves, resulting in a more responsive and efficient engine.

The patriotic themed design, with red, white, and blue ignition shields, adds a unique touch to these headers. This not only helps identify the Doug's Headers brand but also adds a hint of style to the under-hood presentation.

Each pair of Doug's Headers D590-SS headers comes with installation hardware, gaskets, and instructions, ensuring a straightforward installation process. As with all Doug's Headers products, the D590-SS headers are backed by their unwavering commitment to customer satisfaction and US-based technical support. Upgrade your classic Pontiac GTO with a performance component that boasts both style and substance.

Doug's Headers D590-SS 68-72 GTO 326-455 3/4 Collector Headers: Pros and Cons

Doug's Headers D590-SS 3/4 collector headers for the 1968-1972 GTO 326-455 engines are a popular choice among car enthusiasts for improving engine performance. Let's take a closer look at the advantages and disadvantages of investing in these headers.

1. Increased Power and Performance: Doug's Headers are known for their high-performance design, which helps in increasing the engine's power output by providing optimal exhaust flow, reducing back pressure, and improving the combustion process.

2. Enhanced Throttle Response: These headers offer improved throttle response by reducing the amount of exhaust gas volume that needs to be moved before the engine can respond to increased throttle input.

3. Better Fuel Economy: With more efficient exhaust flow and reduced engine stress, Doug's Headers can potentially lead to better fuel economy due to the engine running more efficiently.

4. High-Quality Materials: Doug's Headers are constructed from high-quality materials, such as 321 stainless steel, ensuring durability and longevity.

5. Precise Fitment: These headers are specifically designed for the 1968-1972 GTO 326-455 engines and offer precise fitment, minimizing the need for modifications and adapters.

1. Higher Cost: Doug's Headers can be pricier than some other headers in the market due to their high-performance design and use of high-quality materials.

2. Complex Installation: Installing headers such as these can be a challenging task, requiring expertise and the right tools, which could add to the overall cost and hassle of the project.

3. Removal of Catalytic Converters: The use of headers may require the removal of catalytic converters, which can impact emissions and potentially result in failed emissions inspections, depending on the region's regulations.

Doug's Headers D590-SS 68-72 GTO 326-455 3/4 collector headers can deliver improved power and performance, throttle response, and fuel economy while also presenting a challenge with installation complexities and potentially higher costs than alternative aftermarket headers. However, the stance on the removal of catalytic converters may depend on your specific requirements, local emissions regulations, and desired driving experience.

If you are an enthusiast seeking maximum performance and are willing to invest in a high-quality header setup, Doug's Headers may be a worthy investment. However, if you are looking for a more affordable or less complex header setup, alternative options should be considered. A consultation with a trusted performance shop or expert can help you make an informed decision based on your specific engine and driving applications.

part # d590 prices

• $1018.98-$1178.92

specifications maniheader:

• for models: Gto
• brand: Dougs Headers
• items included: Gasket, Mounting Hardware
• color: Black
• manufacturer part number: D590-SS
• material: Stainless Steel
• vintage part: No
• type: Exhaust Header
• manufacturer warranty: 1 Year
• surface finish: 304 Stainless
• features: Bare
• performance part: Yes
• upc: 694342555115

general maniheader:

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

seller maniheader:

• rating: 98.9%
• # reviews: 5807

shipping maniheader:

• type: Fixed
• transit: 4-9 Days
• cost: $0.00
• carrier: UPS
• service: UPS Ground
• class: Standard

payments maniheader:

• other
• credit card: Mastercard
• wallet: Paypal

offer maniheader:

• sold: 0
• started: January 2, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home

returns maniheader:

• time: 14 Days
• paid by: Buyer
• policy: Returns Accepted

Dougs Headers D590 Is Similar To:

• Dougs Headers D308 Exhaust Header-power Steering Auto Trans Power Brakes (42.9% similar) $1008.99–$1064.21. (August 26th, 2024)
• Dougs D521 Coated Headers 1965 1966 1967 1968 Pontiac Catalina 326-389-400-455 (36.3% similar) $399.00. (September 17th, 2024)
• Dougs Headers D366 Y 5 01 Tri-y Chrome Ceramic Coated Sbc (43.2% similar) $1190.19. (September 27th, 2024)
• Dougs Headers D950 Corvette Exhaust Hi Flow Glass Pack Part No (30.6% similar) $303.94–$1600.00. (September 29th, 2024)
• Dougs Headers Dec300a-1 Electric Cut-out 3 Inch Single Cut (44.3% similar) $341.45–$434.43. (October 12th, 2024)
• Dougs Headers D569 Used-ish 1967-1969 Firebird 326-455 1 3/4 Inch Primary 3 - (61.6% similar) $1203.90–$1291.49. (December 4th, 2024)
• Dougs Headers 9430e 1964-70 Ford Mustang Tri-y Ceramic Coated (40.6% similar) $699.99. (December 9th, 2024)
• Dougs Headers Mp700158 1962-72 Mopar B-body Big Block 1 3/4 Inch Full Length Header With Metallic (45.8% similar) $1008.99. (December 9th, 2024)
• Dougs Headers Mp700161 1962-72 Mopar B-body Big Block 2 Inch Full Length Header With Black Hi-temp (42.2% similar) $1180.35. (December 12th, 2024)
• Dougs D569-b Headers Exhaust Header (30.8% similar) $303.94–$1534.88. (December 12th, 2024)
• Dougs D337-b Headers Black For 1967-1988 Chevy A F G Body 262-400 (28.6% similar) $1099.28. (December 12th, 2024)