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JEGSPART NUMBER: 555-513051

Fabricated Aluminum Tall-Profile Intake Manifold for GM Gen III/IV LS Engines w/Cathedral Port LS1, LS2, LS6-Style Heads

Name: Fabricated Aluminum Tall-Profile Intake Manifold for GM Gen III/IV LS Engines w/Cathedral Port LS1, LS2, LS6-Style Heads
Brand: JEGS
SKU: 555-513051
Price: 489.99 USD
Availability: InStock

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Cathedral Port

Fabricated Aluminum Intake Manifold

GM Gen III/IV LS

Cathedral Port LS1/LS2/LS6

Tall-Profile

102 mm Throttle Bore

Black

Includes:

-6 AN Fuel Rail Kit
MAP Sensor Port Provision
Vacuum Ports
Intake Seals
Hardware

JEGS 555-513051 Fabricated Intake Manifold Includes:
- Fuel rail kit -6 AN w/crossover
- Intake seals
- MAP sensor port
- Hardware
- Vacuum port fittings:
  - (1) 1/8 in. NPT x 1/4 in. barb
  - (1) 1/8 in. NPT x 5/16 in. barb
  - (1) 1/8 in. NPT x 7/16 in. barb
  - (1) 1/4 in. NPT x 1/2 in. barb
JEGS 555-513051 Fabricated Intake Manifold Features:
- Fits GM Gen III/IV LS Engines w/Cathedral Port LS1/LS2/LS6-Style Heads
- 102 mm Throttle Bore
- Fabricated from aluminum and finished in black
JEGS 555-513051 Fabricated Intake Manifold Dimensions:
- Throttle Body Opening: 102 mm
- Front Height: 8.750 in.
- Rear Height: 7 in.
- Front of Engine Block to Intake Front: 2.250 in.

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

Fabricated Airflow for Serious LS Power

JEGS fabricated intake manifolds for GM Gen III/IV LS engines that deliver the airflow capacity and durability demanded by modern high-performance builds. Constructed from fabricated aluminum for strength and consistent airflow, these manifolds are engineered to support cathedral or rectangular port LS cylinder heads while accommodating large throttle bodies for increased air volume and throttle response. Designed for street, strip, and forced-induction combinations alike, the optimized runner and plenum design helps maintain strong power across a broad operating range while supporting upgraded fuel systems and engine management components. Whether you're building a naturally aspirated performance engine or a boosted LS swap, JEGS fabricated intake manifolds provide the airflow foundation needed for reliable horsepower and consistent performance.

Part TypeIntake Manifold

Product LineJEGS GM Gen III/IV LS Fabricated EFI Intake Manifolds

BrandJEGS

Package Height11.2

Package Width17.5

Package Length25.2

Weight22.0 PG

Part CategoryPerformance Parts

Engine Block Deck HeightStandard deck

Aftermarket Fuel Rail RequiredYes

Runners RemovableNo

Throttle Body IncludedNo

Supplemental Bosses Cast-InNo

Plenum MaterialAluminum

QuantitySold individually

Cylinder Head ConfigurationCathedral Port LS1/LS2/LS6

Injectors IncludedNo

RemanufacturedNo

Base ColorBlack

Intake Section IncludedComplete

Basic Operating Rpm Range4,000-8,000

EgrNo

Supplemental Bosses MachinedYes

Throttle Body Bore Size102mm

Runners IncludedYes

Fuel Injection StyleMulti-port

Multi-Port Fuel Rails IncludedYes

Part FitmentSemi Universal

Supplemental Boss QuantityFour

NotesTall profile design. 8.583 in. height. Includes runner o-rings and throttle body o-ring. The included hose barb fittings are 1/8 in. NPT x 1/4 in., 1/8 in. NPT x 5/16 in., 1/8 in. NPT x 7/16 in. and 1/4 in. NPT x 1/2 in. Plenum volume is 9.7 liters.

Base MaterialAluminum

Plenum FinishBlack

Package Qty1

Package TypeEA