Elevate your LS1 build with the Speedmaster Complete Polished Downdraft EFI Stack Intake Manifold System (PN 1-148-042-02). Designed specifically for Chevy GM LS1 engines, this complete system delivers a classic velocity-stack aesthetic combined with modern electronic fuel injection compatibility, giving you the best of both worlds in performance and drivability.
The polished finish provides a stunning show-quality appearance under the hood, while the downdraft stack design promotes improved airflow characteristics suited to high-performance LS1 applications. This is a complete system, meaning everything needed for the conversion is included — making it an ideal choice for builders seeking a cleaner, more straightforward installation on their LS1-powered project.
