Exhaust Manifolds for GM Gen III/IV LS Engines, Flange-Type Collector [Natural Finish]

Name: Exhaust Manifolds for GM Gen III/IV LS Engines, Flange-Type Collector [Natural Finish]
Brand: JEGS
SKU: 555-30140
Price: 319.99 USD
Availability: InStock

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Ships on Sep 17, 2026

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Flange-Type Collector

Exhaust Manifolds

GM Gen III/IV LS

1998-2004 5.7L
1999-2014 5.3L
1999-2017 4.8L
1999-2019 6.0L
2008-2017 6.2L

2 1/4 in. Flange Collector

High-Silicon Ductile-Iron

Flanges & Hardware

Natural Finish

Pair

JEGS 555-30140 Exhaust Manifolds Includes:

(1) Right/Passenger Side Exhaust Manifold
(1) Left/Driver Side Exhaust Manifold
(2) Exhaust Manifold Pipe Flanges
(12) 8 mm-1.25 x 1 in. Exhaust Manifold Bolt with 10 mm Hex Flange Head
(4) 10 mm-1.25 x 2 1/2 in Exhaust Manifold Stud with 1/4 in. Hex Head
(4) 10 mm-1.25 Lock Nut with 14 mm Hex Head

JEGS 555-30140 Exhaust Manifolds Fitment Notes:

Fitment issues may occur with models equipped with air conditioning
Modification to brackets may be required
Not compatible with 2004-2006 GTO starters/bellhousings
Requires JEGS 555-30141 Exhaust Manifold Gaskets or Equivalent (Sold Separately)

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.

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Part TypeExhaust Manifold

BrandJEGS

Package Height4.5

Package Width10.4

Package Length19.7

Weight31.5 PG

Part CategoryPerformance Parts

Exhaust Manifold LocationRight/Passenger Side, Left/Driver Side

Exhaust Manifold Gaskets IncludedNo

QuantitySold as a pair

Mounting Hardware IncludedYes

Part FitmentSemi Universal

RemanufacturedNo

Exhaust Manifold MaterialHigh silicon ductile iron

NotesFeatures a 2.250 in. Outlet Diameter and flange at the collectors. Fitment issues may occur with models equipped with air conditioning. Modification to brackets may be required. Not compatible with 2004-06 GTO starters/bellhousings.

Exhaust Manifold FinishNatural

Package Qty1

Package TypeEA

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