Downdraft EFI Stack Intake Manifold - Chevy LS3 Fuel Injected
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SPEEDMASTERPART NUMBER: 746-1-148-002

Downdraft EFI Stack Intake Manifold - Chevy LS3 Fuel Injected

$2,45000
ShippingShips on 09/08/2026
Lowest PriceLowest Price Guarantee

GM
    Downdraft EFI Stack Intake Manifold
  • Chevy LS3 Fuel Injected
  • Non-EGR
  • Idle-7000 RPM
  • Includes Intake Trumpets and Fuel Rails
  • Aluminum Casting
  • Polished Finish
  • 8-Piece Set

    The Speedmaster Individual throttle body EFI system have all the flash of classic Weber induction but provide higher state of tune and engine performance versatility of EFI. Delivering crisp EFI performance with systems capable of supporting high hp. Fuel and air is delivered through precision cast aluminum 50mm IDA style throttle bodies that allow for superior idle characteristics and astounding throttle response while improving emissions and economy through tight air/fuel ratio control.

    Speedmaster linkage set incorporates the throttle stops, idle controls, lever arms and joiner/balancer all in one. It also features a single screw adjustment for calibrating front to rear throttle shafts.

    The bell crank has a fully indexable eccentric cable pulley that enables good slow speed drivability and still attain full throttle geometry.

    Speedmaster throttle bodies have the following feature:

    - CNC machined, Heat treated 601 Cast aluminum

    - Requires EFI System / Injectors and Sensors

    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

Part TypeIntake Manifold
BrandSPEEDMASTER
Package Height11.5
Package Width12.2
Package Length22.5
Weight25.57 PG
Part CategoryPerformance Parts
Throttle Body Bore Size (Mm)50
Part FitmentSemi Universal
Engine Make/SizeGM LS
Vendor Part Number1-148-002
Package Qty1
Package TypeEA
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