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Doug's Headers D311-R - Doug's Headers for GM Passenger Cars

Doug's Headers D311-R - Doug's Headers for GM Passenger Cars

JEGS Part Number: 776-D311-R

Uncoated/Raw Headers
  • 1955-57 GM LS1/LS6
  • 1-7/8'' Tube Diameter
  • 3'' Collector
  • SAP Port Shape
  • $423.99

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    Doug's Headers D311-R - Doug's Headers for GM Passenger Cars Details

    GM LS1/LS6 - 1-7/8'' Tube Diameter


    • 1955-57 Passenger Car, Wagon


    • Shorty design for maximum ground clearance.
    • O2 bungs are welded on both collectors.
    • Requires use of Street & Performance (or equivalent) billet aluminum adaptors, along with D & P Chassis (or equilvalent) Chevy frame stands.
    • LS1/LS6 engines require the use of a LS1 oil pan for proper header fit.
    • Will fit with 605 power steering box.

    Emission Code:

    • The product accompanying this document is legal only for off-highway use (except in California or states that have adopted California emission standards), racing use or for use on pre-emission-controlled motor vehicles/motor vehicle engines (pre-1974 domestic vehicles certified to California standards, pre-1974 domestic vehicles certified to federal standards and all pre-1974 foreign vehicles), per the manufacturer's application guide.
    Y Y Y Y Y N Y


    Steering System
    Brake System
    Manufacturer's Part Number:

    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%!

  • 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