265-400 Small Block Header 1-5/8" Primary Tubes
Product Discontinued
PATRIOT EXHAUSTPART NUMBER: 737-H8033

265-400 Small Block Header 1-5/8" Primary Tubes

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

GM
265-400 Small Block Header
  • 1-5/8'' Primary Tubes
  • 2-1/2'' Collector
  • Round Port Shape
  • Raw Finish

    Fits:
    • 1935-1948 Fat Fendered Street Rods (Most Chassis)
    Notes:
    • Fenderwell exit.
    • Outside frame exit.
    • Universal application for most street rod applications.
    • Can be used with any oil filter system or transmission and starter combination.
    • Will fit most angle plug heads.
    • Check motor mount position before ordering.
    • Will work on automatic and manual transmissions.

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    • Full length and fenderwell headers provide the ultimate performance for street rodders with high performance engines. These header styles have longer primary tubes, which help produce more horsepower and torque than Tight Tucks.

      Chassis headers fit inside the frame rails, but if there is not enough room, our "up and over" fenderwell headers will provide the same great performance with an awesome look.

      See More Details for Applications Listing.

      Show More
      Dimensions (Inches)
      Part NumberA-LeftA-RightB-LeftB-RightC-LeftC-Right
      737-H80122''2''16''14''23''27''
      737-H80173-1/2''3-1/2''16-3/4''16-3/4''19''19''
      737-H80183-1/2''3-1/2''17-1/2''17-1/2''23-1/4''23-1/4''
      737-H80214-1/8''4-1/4''15''11''23''25''
      737-H80337-1/2''7-1/2''14-1/2''14-1/2''27''27''
      737-H803510''10''17''17''29''26-1/2''
      737-H80367''3-5/8''8-1/2''8-1/2''21''22''
      737-H84293''3-1/4''18''18-1/2''19''19-1/2''
      737-H84303-1/4''4''10-1/2''6-3/4''19''18-3/4''
    Part TypeHeader
    Product LinePatriot Street Rod Headers
    BrandPATRIOT EXHAUST
    Package Height11.0
    Package Width21.0
    Package Length38.75
    Weight31.4 PG
    Part CategoryPerformance Parts
    Header FinishNatural
    QuantitySold as a pair
    Bolts/Studs IncludedYes
    Cylinder Head Port ShapeRound
    Transmission Mount IncludedNo
    Header MaterialSteel
    Gaskets IncludedYes
    Weld-UpNo
    Collector Attachment3-bolt flange
    Flange StyleStandard
    TunedNo
    Collector Diameter2.5 in (63.5 mm)
    Motor Mounts IncludedNo
    Part FitmentSemi Universal
    Reducers IncludedNo
    Primary Tube Gauge16-gauge
    Header StyleFenderwell
    Cross Over Pipe IncludedNo
    Catalytic Converter(S) IncludedNo
    Primary Tube Diameter1.625 in (41.3 mm)
    Vendor Part NumberH8033
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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