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![Header Flange for GM LS1/LS2/LS3/LS6 [Round Port]](https://www.jegs.com/images/mini_750/500/555/555-31803.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-31803
Header Flange for GM LS1/LS2/LS3/LS6 [Round Port]
$6299$77.99You Save$15.00
5 left in stock
Ships on Nov 16, 2026
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JEGS
Part Number : 555-210851
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Part Number : 555-28031
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Part Number : 555-30712
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![Socket Set, 3/8 in. & 1/4 in. Drive [SAE/Metric 52-Piece]](https://www.jegs.com/images/mini_200/500/555/555-81565.jpg)
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GM LS Header Flanges
- Header Flange
- GM LS1/LS2/LS3/LS6
- 2 in. Round Port
- 3/8 in. Thick Steel Flanges
- Sold Individually
Laser Cut Header Flanges for a Perfect Fit
JEGS Exhaust Header Flanges are precision CNC laser cut from 3/8 in. thick (Except Where Noted) steel plate for strength and durability. Available in a variety of configurations for the most common applications. Sold Individually. Gaskets, bolts and tubing kit are sold separately. Requires welding.
JEGS Open Wheel Long Tube Weld-Up Headers
JEGS Block Hugger Weld-Up Headers
JEGS In-Chassis Long Tube Weld-Up Headers
Part TypeExhaust Flange
Product LineJEGS Exhaust Header Flanges
BrandJEGS
Package Height0.2
Package Width4.1
Package Length17.8
Weight1.9 PG
Part CategoryPerformance Parts
Includes Stubs For Primary TubesNo
Gaskets IncludedNo
Header Flange Thickness0.375 in (9.525 mm)
Header Flange Port Size2 in (50.8 mm)
Header Flange Port ShapeRound
Header Bolt PatternStock
Header Flange MaterialSteel
Part FitmentSemi Universal
Engine Make/SizeChevy Small Block LS Series
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
