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Doug's Headers® D336 - 4-Tube Steel Long Tube Exhaust Headers

1 review|Item # mpn4564003964
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Notes:
  • This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. Shipping Restriction: CA, NY, ME.
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$904.45
In Stock (19) - Ships in 24 to 48 hrs
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Vehicle Fitment

Chevy
Oldsmobile
Pontiac

Specifications

Series
4-Tube
Header Material
Steel
Header Style
Long Tube
Primary Diameter
1.75"
Bolts/Studs Included
Yes
Catalytic Converter(s) Included
No
Collector Attachment
3-bolt flange
Collector Diameter (in.)
3.00
Collector Reducer Exit Diameter
2.500 in.
Collector Reducers Included
Yes
Crossover Pipe Included
No
Cylinder Head Port Shape
Oval
Flange Style
Standard
Flange Thickness (in.)
0.38 in.
Gaskets Included
Yes
Header Color
Silver ceramic coated
Header Style
Long tube one-piece
Motor Mounts Included
No
Primary Tube Gauge
16-gauge
Primary Tube Outside Diameter (in.)
1 3/4 in.
Quantity
Sold as a pair.
Spark Plug Position
Angle/Straight
Transmission Mount Included
No
Tuned
No
Weld-Up
No

Features

  • Doug's Headers D3373 Metallic Ceramic Coating
  • 3/8" thick flanges
  • CNC mandrel bent tubes... accurate fit & better flow
  • Precision formed long transition collectors and long tube design... reduces backpressure and increases higher RPM horsepower
  • Heavy 16 gauge tubing
  • Tubes are pre-polished to remove scratches and the header is finished with a Metallic Ceramic Thermal Barrier
  • Coating polished to a high luster appearance offering corrosion and heat resistance up to 1400 degrees

Product Details

4-Tube Steel Long Tube Exhaust Headers (D336) by Doug's Headers®. Primary Tubing Diameter: 1.75". Color: Silver. Header Style: Long Tube. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Doug's Headers Authorized Dealer
Brand:
Doug's Headers
Part Number:
D336
UPC:
694342540548

Reviews

(1)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-1 of 1 Reviews
5 of 5
Woke Up My Car
I'm restoring my 1963 Mercury Meteor. Headers fit great, look killer. The car pulls so much better off the line now. Not the easiest install but totally worth it.
Posted by Jerome (Charlotte, NC) / February 09, 2025

Questions and Answers

(0)
If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!