Speedmaster Chevy GM LS3 Downdraft EFI Stack Intake Manifold System Polished 1-148-002

The Speedmaster Chevy GM LS3 Downdraft EFI Stack Intake Manifold System (MPN 1-148-002) is a complete, ready-to-install intake manifold designed for LS3 engine applications. This polished downdraft EFI stack system delivers the essential airflow path and fuel delivery optimization required for modern electronically fuel-injected LS engines, supporting both street and performance builds.

This complete system comes fully assembled and polished for a premium appearance in engine bays. The downdraft design and EFI stack configuration are engineered to work seamlessly with LS3 engine platforms, making it an ideal choice for engine swaps, restorations, and performance builds where factory or direct-fit intake solutions are required. Installation is straightforward for builders and technicians familiar with LS engine architecture.

Key Features & Benefits

• LS3 Specific Design: Purpose-built intake manifold system engineered specifically for Chevy GM LS3 engines.
• Downdraft EFI Stack: Downdraft configuration with EFI stack design optimizes air and fuel delivery for electronic fuel injection systems.
• Complete Ready-to-Install: Arrives fully assembled and polished, ready for direct installation on compatible LS3 platforms.
• Polished Finish: Premium polished appearance enhances engine bay aesthetics while the finish resists corrosion.
• Direct Fit Application: Engineered as a direct replacement or upgrade for LS3 intake manifold systems on Chevy GM engines.

Specifications

Ideal Applications

• LS3 engine swaps and conversions in custom or classic vehicles
• Performance engine builds and rebuilds requiring optimized intake flow
• Direct replacement intake manifold upgrades for existing LS3 platforms
• Street and strip applications where fuel injection reliability is critical