Exhaust Manifolds for GM Gen III/IV LS Engines, Flange-Type Collector [Silver Ceramic Coated]

Name: Exhaust Manifolds for GM Gen III/IV LS Engines, Flange-Type Collector [Silver Ceramic Coated]
Brand: JEGS
SKU: 555-30142
Price: 389.99 USD
Availability: InStock

^$389⁹⁹$421.19You Save$31.20

Ships on 11/09/2026

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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

Silver Ceramic

Pair

JEGS 555-30142 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 555-30142 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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Classic Muscle Sound with Modern LS Performance

JEGS exhaust manifolds for GM Gen III/IV LS engines deliver the durability of cast manifolds with improved flow characteristics designed for high-performance street, swap, and race applications. Manufactured from high-silicon ductile iron for excellent strength and heat resistance, these manifolds are engineered to support popular LS-based engine combinations while maintaining a compact fit for tight engine bays. Available in flange-style or V-band collector configurations with natural or ceramic-coated finishes, JEGS LS exhaust manifolds provide dependable sealing, improved exhaust flow, and long-lasting performance for hot rods, muscle cars, trucks, and custom builds.

Part TypeExhaust Manifold

Product LineJEGS LS Engine Swap Cast Iron Exhaust Manifolds

BrandJEGS

Package Height8.7

Package Width10.4

Package Length22.1

Weight30.0 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 FinishSilver ceramic coated

Package Qty1

Package TypeEA

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