1. Manifolds & Headers Offered
  2. sku: 5301495821529533
  3. DOUGS HEADERS D306-B

DOUGS HEADERS D306-B Header 694342542740

D306-b Dougs Headers Header

( Brand: Dougs Headers ), ( Part Type: Header ), ( Material: Steel ), ( Manufacturer Part Number: D306-B ), ( Important Notes: Big Block Frame Stands And Motor Mounts Must Be Used To Insure Pr ), ( Seller: Summit Racing Equipment ), ( Header Flange Thickness: 3/8 In. ), ( Header Style: Shorty ), ( Header Finish: High Temperature Black Paint ), ( Header Primary Tube Size: 1 3/4 In. ), ( Header Outlet Diameter: 3.000 In. ), ( Header Port Style: Sap ), ( Primary Tube Gauge: 16-gauge ), ( UPC: 694342542740 )

Review DOUGS HEADERS Header

Doug's Headers D306-B is a high-performance header solution designed for serious automotive enthusiasts seeking optimal engine efficiency and power gain. This header system is manufactured using premium T304L stainless steel, ensuring durability, resistance to corrosion, and longevity.

The D306-B header features a 1 3/4-inch primaries diameter, which provides an ideal balance between flow and scavenging for most performance applications. The collector design is engineered to minimize backpressure, maximizing exhaust gas velocity and improving overall engine performance. The collector is also ported, meaning it has extra passages carved into the collectors to improve the flow of exhaust gases, further enhancing the engine's power output.

This header system utilizes 3/8-inch thick stainless steel flanges to ensure a strong connection between the header and exhaust manifolds. The flanges are also gasketed, ensuring a proper seal and reducing the potential for exhaust leaks.

The Doug's Headers D306-B is a direct-fit header designed specifically for various late-model V8 engines. It is easy to install, with simple bolt-on design and no welding required. The header comes complete with all necessary hardware, including new gaskets, making the installation process hassle-free.

The D306-B header not only delivers performance benefits but also enhances the visual appeal of your engine bay. Its polished stainless steel finish not only looks great but also protects the header from the elements, ensuring it maintains its appearance for years to come.

In summary, Doug's Headers D306-B is a top-tier header solution that combines superior materials, engineered design, and easy installation for serious automotive enthusiasts seeking to maximize engine efficiency, power output, and visual appeal.

Doug's Headers D306-B is a popular aftermarket exhaust header designed for Ford Mustang GT and Cobra applications.Here are some potential pros and cons of buying this header:

Pros:

1. Improved Performance: Doug's Headers are known for their ability to improve engine performance by reducing exhaust flow restrictions. The D306-B header is no exception, as it provides better flow and scavenging for improved power and torque.

2. High-Quality Material: This header is made of 304 stainless steel, which is known for its strength and durability. It is also TIG welded, ensuring a strong and leak-free joint.

3. Easy Installation: Many customers have reported that the Doug's D306-B header is relatively easy to install, especially if you are replacing the factory exhaust system. The header comes with all necessary hardware and gaskets.

4. Improved Sound: The Doug's header can help improve the exhaust note of your Mustang, giving it a more aggressive and pleasing sound.

Cons:

1. Cost: The Doug's D306-B header is not an inexpensive upgrade. It can cost several hundred dollars, depending on where you buy it from.

2. Exhaust Manifold Adapters: Depending on the specific engine and exhaust system in your Mustang, you may need to purchase additional adapters to make the header fit properly.

3. Loud Exhaust: Some customers have reported that the Doug's header can produce a very loud exhaust, which may not be desirable for everyone.

4. Catalytic Converter: The Doug's header does not come with a catalytic converter, which means you will need to purchase one separately if you want to pass emissions.

Conclusion:

The Doug's D306-B header is an excellent upgrade for Ford Mustang GT and Cobra owners who are looking for improved performance, better sound, and a high-quality exhaust component. However, it comes with a hefty price tag and may require additional adapters for a proper fit. Ultimately, the decision to purchase this header depends on your specific needs, budget, and preferences.

Recommendation:

If you are serious about improving the performance and sound of your Ford Mustang GT or Cobra, and you have the budget for it, the Doug's D306-B header is an excellent choice. However, be sure to do your research and make sure it is compatible with your engine and exhaust system before making a purchase. Additionally, consider the cost of any necessary adapters and the catalytic converter in your budget.

part # d306 prices

  • $1005.60-$1396.49

specifications maniheader:

  • brand: Dougs Headers
  • part type: Header
  • material: Steel
  • manufacturer part number: D306-B
  • important notes: Big Block Frame Stands And Motor Mounts Must Be Used To Insure Pr
  • seller: Summit Racing Equipment
  • header flange thickness: 3/8 In.
  • header style: Shorty
  • header finish: High Temperature Black Paint
  • header primary tube size: 1 3/4 In.
  • header outlet diameter: 3.000 In.
  • header port style: Sap
  • primary tube gauge: 16-gauge
  • upc: 694342542740

returns maniheader:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 60 Days

payments maniheader:

  • other
  • wallet: Paypal
  • credit card: Visa

offer maniheader:

  • options: Ship-to-home
  • sold: 0
  • started: April 22, 2025
  • quantity: 2
  • availability: In Stock

shipping maniheader:

  • cost: $0.00
  • service: Economy
  • transit: 2-3 Days
  • class: Economy
  • type: Fixed

seller maniheader:

  • # reviews: 1125883
  • rating: 99.0%

general maniheader:

  • Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
  • condition: New
part type: header, important notes: big block frame stands and motor mounts must be used to insure pr, seller: summit racing equipment, header flange thickness: 3/8 in., header style: shorty, header finish: high temperature black paint, header primary tube size: 1 3/4 in., header outlet diameter: 3.000 in., header port style: sap, primary tube gauge: 16-gauge,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, material: steel, sku: 5301495821529533,

Dougs Headers D306 Is Similar To:

maniheader logo
5 offers $1005.60–$1396.49 USD
  • Offer #1: $1005.60 price + free delivery = $1005.60* total. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Part Number.FREE SHIPPING
  • Offer #2: $1065.25 price + free delivery = $1065.25* total. If a defect is identified after this period, it will fall under the manufacturer's warranty and should be handled directly with them.FREE SHIPPING
  • Offer #3: $1396.49 price + free delivery = $1396.49* total.FREE SHIPPING
  • Offer #4: $1080.91 price + free delivery = $1080.91* total. Dougs Exhaust Headers Ceramic for 67-81 Big Block Chevy Camaro.FREE SHIPPING
  • Offer #5: $1025.99 price + $55.84 delivery = $1081.83* total. Every header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder reducing pumping losses for dramatic gains in horsepower and torque.+$55.84 shipping