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GM LS Rectangle Port Carburettor Street Single Plane Intake Manifold
  • GM LS Rectangle Port Carburettor Street Single Plane Intake Manifold
  • GM LS Rectangle Port Carburettor Street Single Plane Intake Manifold
GM LS Rectangle Port Carburettor Street Single Plane Intake Manifold

GM LS Rectangle Port Carburettor Street Single Plane Intake Manifold

$508.70

SKU: AF6040-6000

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Convert your GM LS engine from EFI to Non-EFI carburettor in retrofit applications with this Aeroflow Performance Street low rise cast intake manifold. The GM LS Rectangle Port Carburettor Street Single Plane Non-EFI Intake Manifold arrives in a natural cast finish and is engineered for 4-barrel square-bore carburettors with a 4150 flange, specifically suited to GM LS3 rectangle port cylinder heads. This non-EFI configuration preserves a classic carburettor setup while delivering reliable, steady air and fuel delivery for improved street and performance drivability.

Compatibility and design

  • Fits GM LS Gen III and IV engines equipped with OE or aftermarket LS3 rectangle port heads
  • Non-EFI applications only
  • Single Plane configuration for efficient air/fuel distribution at higher RPM
  • Carburettor pad supports aftermarket 4150 square-bore carbs with manual or electric choke options

Specifications

  • RPM operating range: 2500 to 7000
  • Square bore carburettor pad (4150 flange)
  • Overall height from carb pad to bottom: 122 mm (check bonnet clearance)
  • Port size: 1.15" x 2.50"
  • Gasket O-Ring: AF6233-5002
  • Carburettor studs: 5/16-18" (x4)
  • Port: 3/8" NPT (x1)
  • Mounting holes: 6 x 5/16-18"

What’s included

  • 8 x Intake Manifold O-Ring Gaskets (AF6233-5002)
  • 4 x M6 x 1.00mm Hex Screws (80 mm UHL)
  • 6 x M6 x 1.00mm (50 mm UHL)
  • 10 x M6 Flat Washers
  • 1 x 3/8" NPT Steel Port Plug

Installation notes and benefits

Designed to convert your GM LS engine from EFI to Non-EFI carburettor in retro-fit applications, this street low-rise cast intake manifold helps maintain consistent air and fuel flow into the engine for dependable performance. The carburettor mounting pad is built to accommodate aftermarket 4150 square-bore carburettors, offering compatibility with both manual and electric choke options. Built specifically for GM LS Gen III and IV engines with LS3 rectangle port heads, this intake manifold provides a straightforward, durable platform for carburetted setups.

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