1. Manifolds & Headers Offered
  2. sku: 6256932609285761
  3. DOUGS HEADERS D323-B

DOUGS HEADERS D323-B Big 7/8 67-69 68-74

fits model: 350, Camaro, Nova. make: Chevy.

D323-b Dougs Headers D323 Big 1 7/8 Black Chevy Sbc 350 67-69 Camaro Nova 68-74

( Brand: Dougs Headers ), ( Items Included: Mounting Hardware ), ( Color: Black ), ( Manufacturer Part Number: D323-B ), ( Material: Mild Steel ), ( Vintage Part: No ), ( Placement On Vehicle: Front ), ( Fuel Type: Gasoline ), ( Type: Exhaust Header ), ( Features: Heat-resistant ), ( Country/region Of Manufacture: United States ), ( Performance Part: Yes )

Review DOUGS HEADERS Big 7/8 Black Chevy Sbc 67-69 68-74 fits CAMARO NOVA 350

Doug's Headers D323-B is a high-performance exhaust header solution designed specifically for 1967 to 1969 Chevrolet Camaro and Nova vehicles equipped with a 350 cubic inch small-block engine. This header set is part of Doug's Big Mouth series, which is renowned for its robust design and impressive power gains.

The D323-B headers feature 7/8-inch primary tubes, ensuring optimal exhaust flow and scavenging for better engine performance. The collectors are designed to provide excellent flow and fitment, ensuring a seamless connection to the exhaust system. These headers are constructed from 304 stainless steel, which is known for its superior strength and resistance to corrosion, making it an ideal choice for high-performance applications.

The Doug's Headers D323-B design includes a 1 5/8-inch merge collector, which is an important factor in maximizing exhaust flow and power. The collector is equipped with a 3-inch outlet diameter, ensuring a perfect fit with most aftermarket exhaust systems. The header set also comes with 1 5/8-inch high-performance exhaust gaskets, ensuring a leak-free seal between the header and engine block.

One of the standout features of the D323-B headers is their ability to deliver significant power gains. By improving exhaust flow and reducing backpressure, these headers can help increase horsepower and torque, making them an excellent choice for anyone looking to maximize the performance of their 350 cubic inch small-block Chevrolet Camaro or Nova.

Another advantage of the Doug's Headers D323-B is their ease of installation. They come with detailed instructions and are designed to fit with minimal modification required, making them a popular choice among enthusiasts and professionals alike.

In summary, the Doug's Headers D323-B is a top-quality exhaust header solution designed for 1967 to 1969 Chevrolet Camaro and Nova vehicles with a 350 cubic inch small-block engine. Featuring 7/8-inch primary tubes, a 1 5/8-inch merge collector, and 304 stainless steel construction, these headers deliver impressive power gains, superior fitment, and unmatched durability. With their easy installation process and detailed instructions, the D323-B headers are an excellent investment for anyone looking to enhance the performance of their classic Chevrolet.

Doug's Headers D323-B, also known as "D323 Big Muffs," are aftermarket header sets designed for 1967-1969 Camaro and Nova vehicles with a 350 6-71 quad-carb Chevy engine. Like any aftermarket part, these headers come with their own set of pros and cons.

Pros:

1. Improved Performance: Doug's Headers are designed to improve airflow and exhaust gas velocity, which results in better engine performance. The larger primary tubes and merge collectors promote better scavenging and more efficient combustion.

2. Enhanced Power: This header set is known to increase horsepower and torque, making your engine more responsive and powerful.

3. Custom Fit: Doug's Headers are specifically designed for the given application, ensuring a perfect fit and easy installation.

4. Durability: These headers are manufactured from high-quality materials, including 304 stainless steel, which ensures durability and resistance to rust and corrosion.

5. Improved Sound: Doug's Headers are famous for their unique exhaust note, which adds to the overall driving experience.

Cons:

1. Cost: Doug's Headers are a premium aftermarket product, and their price reflects their high-performance capabilities.

2. Installation Complexity: Installing headers on a 67-69 Camaro or Nova can be a challenging task, especially for those without prior experience. It is essential to follow the instructions carefully and have the necessary tools and skills to accomplish the installation.

3. Catalytic Converter Removal: In order to install Doug's Headers, you will need to remove your catalytic converter, which may require additional modifications to your exhaust system.

4. Possible Exhaust Leaks: Due to the custom fit and complex installation process, there is a potential for exhaust leaks, which can negatively impact performance and potentially create safety hazards.

Conclusion:

Doug's Headers D323-B offer significant performance benefits, including improved power and efficiency, custom fit, durability, and enhanced sound. However, they also come with some drawbacks, such as cost, installation complexity, catalytic converter removal, and the potential for exhaust leaks.

Recommendation:

If you are a dedicated enthusiast looking for maximum performance and an authentic exhaust note, Doug's Headers D323-B may be the perfect choice for you. Ensure that you have the necessary skills, tools, and time to install the headers properly, and be prepared for the additional cost. If you're unsure about your installation capabilities, consider hiring a professional to ensure a safe and efficient installation.

specifications maniheader:

  • for models: 350, Camaro, Nova
  • for makes: Chevy
  • brand: Dougs Headers
  • items included: Mounting Hardware
  • color: Black
  • manufacturer part number: D323-B
  • material: Mild Steel
  • vintage part: No
  • placement on vehicle: Front
  • fuel type: Gasoline
  • type: Exhaust Header
  • features: Heat-resistant
  • country/region of manufacture: United States
  • performance part: Yes

payments maniheader:

  • other
  • wallet: Paypal
  • credit card: Mastercard

offer maniheader:

  • sold: 0
  • options: Ship-to-home
  • started: June 12, 2025
  • quantity: 1
  • availability: In Stock

seller maniheader:

  • rating: 100.0%
  • # reviews: 5262

general maniheader:

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

shipping maniheader:

  • type: Fixed
  • class: Economy
  • service: Economy
  • transit: 4-8 Days
  • cost: $69.99

returns maniheader:

  • policy: No Returns
for models: 350, camaro, nova, for makes: chevy, items included: mounting hardware, vintage part: no, placement on vehicle: front, fuel type: gasoline, type: exhaust header, features: heat-resistant, country/region of manufacture: united states, performance part: yes,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, color: black, material: mild steel, sku: 6256932609285761,

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