LS3 Low Ram Intake Kit Dual Injector Top Feed

The LS3 Low Ram Intake Kit Dual Injector Top Feed (model 300-683BK) represents a purpose-built solution for builders and enthusiasts running GM LS-series powerplants who demand efficient fuel delivery and clean engine bay aesthetics. This Holley intake manifold bridges the gap between stock limitations and full tunnel-ram aggression, offering a compact low-ram design that maximizes airflow without consuming excessive underhood real estate. Whether you're restoring a classic, tuning a street engine, or building a dedicated performance platform, this dual-injector top-feed configuration delivers the precision metering and responsive throttle response that separates competent builds from exceptional ones.

Constructed from aluminum with a black powder-coat finish, the LS3 Low Ram Intake Kit features a 105 mm throttle body flange and dual top-entry fuel injector bosses that integrate seamlessly with modern EFI systems and custom fuel rails. The low-ram runner geometry minimizes pulsation and tuning complexity while maintaining the velocity and scavenging characteristics needed for efficient combustion across the RPM band. Aluminum construction keeps weight manageable—the complete kit weighs 35.7 lbs—without sacrificing the thermal stability and durability required in high-output applications. The black powder-coat finish resists corrosion and provides a professional appearance that suits both street and competition environments.

This manifold is engineered specifically for LS3 cylinder heads and compatible with the broader GM LS-series platform, making it ideal for engine swaps, restorations, and performance upgrades on a wide spectrum of vehicles. Installation requires proper fuel system tuning, ECU calibration, and intake gasket sealing to realize full potential; experienced builders or qualified shops should handle integration to ensure reliability and optimal performance. The dual-injector top-feed design accommodates both traditional and modern fuel injection schemes, offering flexibility for custom builds and allowing future tuning adjustments without core replacement.