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FAST

FAST Replacement Intake Port Seal

MPN: 146003-1 Catalog #: 001133423 Category: Intake Manifold Plenum Check Vehicle Fitment

Product Details

This gasket is designed to provide a seal between the LSXR 102mm intake manifold and an LS3 Rectangular Port design cylinder head.

See 146203-1 or 146203-8 for LS1, LS6 and LS7 applications.

LSXR 102mm LS3 Intake Manifold Port to Cylinder Head Seal

LSXR 102 LS3 Intake to Head Port Seal

Replacement Intake Port Seal, for LS3

Engine Intake Manifold O-Ring Kit

FAST Replacement Intake Port Seal

Manifold O-Ring Kit

LSXRLS3PortSeal

No

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Engine Compatibility

GM - LSMatched variant: LS1

GM Gen III/IV V8; LS1/LS2/LS3/LS6/LS7/LS9/LSA/LSX

Fitment note: Engine compatibility is provided as a guide. Please verify all fitment details before ordering.

Product Specs

Brand
FAST
Part Number
146003-1
Catalog Number
001133423
Product Line
FAST Seals
Category
Engines & Parts
Type
Intake Manifold Plenum
UPC / Barcode
036584201809
Vendor Product Category
Engine Components
Vendor Product Subcategory
Gasket Kits
Length
5.00 in
Width
3.00 in
Height
0.25 in
Weight
0.75 lb
Units Per SKU
1
Freight / LTL
No
Air Restricted
No
Prop 65
Unknown
CARB Approved
No
Clearance Item
No

Shipping & Availability

Current status 2 Available - Ready to ship
Estimated timing Ships from factory

This item is showing manufacturer availability and may ship directly from the manufacturer. Tracking details are provided as soon as they become available. ETA 0-5 Days to ship.

STATE RESTRICTIONS: This item is not CARB approved and can not ship to California.

PROP 65 WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Inventory shown: 2 available as of 6/4/2026.

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