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Header Flange for Big Block Chevy [Round Port]
InfoVehicle Info Needed
JEGSPART NUMBER: 555-31807

Header Flange for Big Block Chevy [Round Port]

$2999$32.99You Save$3.00
More than 10 available
ShippingShips on Sep 08, 2026
Lowest PriceLowest Price Guarantee

Chevy Big Block Header Flanges
    Header Flange
  • Big Block Chevy
  • 2 1/8 in. Round Port
  • 3/8 in. Thick Steel Flange
  • Sold Individually

  • Precision cnc laser cut from 3/8 “ thick steel plate for strength and durability
  • One per package with other sizes available separately
  • Specifications: 2-1/8” round port, 3/8 “ thick
  • Made in usa with high quality components and assembly
  • Constructed from steel for strength and long life
Part TypeExhaust Flange
BrandJEGS
Package Height0.3
Package Width5.7
Package Length21.5
Weight2.4 PG
Part CategoryPerformance Parts
Includes Stubs For Primary TubesNo
Gaskets IncludedNo
Header Flange Thickness0.375 in (9.525 mm)
Header Flange Port Size2.125 in (53.975 mm)
Header Flange Port ShapeRound
Header Bolt PatternStock
Header Flange MaterialSteel
Part FitmentSemi Universal
Engine Make/SizeChevy Big Block (396-454)
Package Qty1
Package TypeEA
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