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![Long Tube Header for 1965-1981 GM F & A-Body Big Block Chevy [304 Stainless Steel]](https://www.jegs.com/images/mini_750/700/776/776-d313-ss.jpg)
Vehicle Info NeededDOUG'S HEADERSPART NUMBER: 776-D313-SS
Long Tube Header for 1965-1981 GM F & A-Body Big Block Chevy [304 Stainless Steel]
$85852$953.91You Save$95.39
Ships on 09/15/2026
Lowest Price GuaranteeBig Block Chevy - 1-3/4'' Tube Diameter
Long Tube Header1965-1981 GM F & A-Body Big Block Chevy 265-350 Big Block Chevy V8 1.75 in. Primary Tubes with 3.0 in. Collector 16-gauge 304 Stainless Steel Construction Gaskets Included
Hand-built to Doug's exacting standards, this long tube header gives enthusiasts a direct path to more power with mandrel-bent tubing and a precision-matched flange.
Header Specifications:
- 1965-1981 GM F & A-Body Big Block Chevy
- 265-350 Big Block Chevy V8
- 1.75 in. Primary Tubes with 3.0 in. Collector
- 16-gauge 304 Stainless Steel Construction
- Gaskets Included
Every Doug's Header is Tuned with the Proper Tube Size & Length to Efficiently Remove Exhaust Gasses from Each Cylinder
Headers feature 3/8'' flanges and 16-gauge tubing on passenger car applications. They include all necessary mounting hardware, collector reducers or connection pipes, premium gaskets and detailed instructions. Headers are available in either a Metallic Ceramic Thermal Barrier Coating or a uncoated raw finish. The Metallic Ceramic Thermal Barrier Coating will withstand up to 1400 degree temperatures! This coating is polished which increases corrosion resistance over 60%!
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Features:
- Thick Flanges Prevent Warping
- Stitch Welded Ports for Added Strength
- Machined Sealing Bead Eliminates Leaks
- Heavy Gauge Tubing for Longer Life
- Precision-Formed Collectors Reduce Back Pressure
- CNC Mandrel-Bent Tubing Provides Accurate Fit & Better Flow
See More Info for Applications Listing
Part TypeHeader
Product LineDoug's Headers for GM Passenger Cars
BrandDOUG'S HEADERS
Package Height11.0
Package Width21.0
Package Length39.0
Weight43.0 PG
Part CategoryPerformance Parts
PositionN/A
Header FinishNatural
QuantitySold as a pair
Bolts/Studs IncludedYes
Cylinder Head Port ShapeSAP
Transmission Mount IncludedNo
Header Material304 Stainless Steel
Gaskets IncludedYes
Weld-UpNo
Brake SystemVarious - Application Specific
Collector Attachment3-bolt flange
Flange StyleStandard
TunedNo
Collector Diameter3.0 in.
Motor Mounts IncludedNo
Part FitmentSemi Universal
Reducers IncludedYes
Primary Tube Outside Diameter1.75 in.
Primary Tube Gauge16-gauge
Header StyleFull-length
Cross Over Pipe IncludedNo
Catalytic Converter(S) IncludedNo
Primary Tube Diameter1.75 in (44.5 mm)
Vendor Part NumberD313-SS
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
