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FAST LSX Intake 92mm LS1, LS2 & LS6 - Black

MPN: 54039B Catalog #: 00588505 Category: Intake Manifolds Check Vehicle Fitment

Product Details

Replacement parts available. See 54039BUS for the upper shell. See 54039BLS for lower shell. Billet fuel rails available under 54023. Compatible throttle bodies available under 54092 and 54090.

The FAST LSX 92mm Intake Manifold for GM LS1, LS2 and LS6 engines provides bolt-on performance gains without any loss in bottom-end drivability.

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LSX Intake fits Cathedral Port Cylinder Heads - LS1, LS6 & LS2

Forget about inferior knock-offs, the patented LSX 92mm Black Intake Manifold from FAST is the only three-piece Gen III composite manifold proven to deliver increased performance without compromising bottom-end drivability or high RPM power. For both street and racing applications, the new black intake manifold is an easy bolt-on installation for GM Gen III (LS1, -2 & -6) engines and is designed to work with the FAST Big Mouth Throttle Body.

The new FAST LSX 92mm Black Intake Manifold maintains the performance gains achieved over stock intake manifolds with no loss in drivability or low RPM torque. While the new stylish, black intake manifold delivers terrific performance right out of the box, it can be ported by the customer for even more flow. As requested by previous LSX customers, the intake features the added benefits of corrosion-free stainless steel assembly bolts, an improved throttle body sealing flange and o-ring gasket and threaded insert throttle body mounts that provide increased durability.

*Drive-by-wire engines (LS2) can re-use the OEM GM 90mm electronic 4-bolt throttle body.

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Intake Manifold - LSX - 92 mm Throttle Body Flange - Cathedral Port - Multi Port - Plastic - Black - LS1 / LS2 / LS6 - GM LS-Series - Each

1997–2004 FAST LSX Intake 92mm LS1, LS2 & LS6 - Black

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The new FAST LSX 92mm Black Intake Manifold maintains the performance gains achieved over stock intake manifolds with no loss in drivability or low RPM torque. While the new stylish, black intake manifold delivers terrific performance right out of the box, it can be ported by the customer for even more flow. As requested by previous LSX customers, the intake features the added benefits of corrosion-free stainless steel assembly bolts, an improved throttle body sealing flange and o-ring gasket and threaded insert throttle body mounts that provide increased durability.

  • New “Black” Gen III intake manifold with 92mm throttle body intake opening & added refinements
  • Improved throttle body sealing flange & o-ring gasket
  • Includes stainless steel bolts, threaded insert throttle body mounts & mounting hardware
  • Incorporates high-quality polymer materials, which resist “heat sink” effect of aluminum
  • Maximizes potential of other popular engine performance upgrades such as cylinder heads
  • Designed to work in conjunction with the new FAST Big Mouth Throttle Body (92mm)

Drive-By-Cable Throttle Body Options*

    • Big Mouth 92mm Throttle Body - Part# 54092
    • Stock/OEM 3-Bolt LS1 Throttle body can be used with our 3-to-4 Bolt Throttle Body Adaptor Plate
      • - Part# 146029-KIT

Fuel Rail Options (LS1, LS6, & LS2)

  • LS1/LS6 Engine:
    • OEM Stock GM LS1/LS6 fuel rails will bolt right on
    • Billet Fuel Rail Kit (Red) - Part# 54023 - If using OEM fuel lines, one of the below OEM Fuel Line Conversions is required:
      • OEM Fuel Line Conversion Kit - Part# 54028-KIT
      • OEM Fuel Line Conversion Kit w/Fuel Pressure Gauge - Part# 54028G-KIT
  • LS2 Engine:
    • Adaptor Kit for Stock/OEM LS2 Fuel Rails - Part# 54026
    • Billet Fuel Rail Kit (Red) - Part# 54023

*Drive-by-wire engines (LS2) can re-use the OEM GM 90mm electronic 4-bolt throttle body.

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Vehicle Fitment

Please verify year, make, model, and any notes before ordering.

Engine Compatibility

GM - LSMatched variant: LS

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
54039B
Catalog Number
00588505
Product Line
Intake Manifolds
Category
Engines & Parts
Type
Intake Manifolds
UPC / Barcode
036584255697
Vendor Product Category
Engine Components
Vendor Product Subcategory
Intake Manifolds
Length
27.90 in
Width
16.50 in
Height
10.10 in
Weight
17.30 lb
Units Per SKU
1
Freight / LTL
No
Ship Alone
Yes
Air Restricted
No
Prop 65
Y
EPA Status
Compliant
CARB Approved
Yes
CARB EO Number
D-279-10
Clearance Item
No

Shipping & Availability

Current status 12 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

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: 12 available as of 6/4/2026.

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