EFI Intake Manifold GM LS3 Single Plane

The Holley EFI Intake Manifold GM LS3 Single Plane (model 300-290) is an exceptional choice for builders aiming to maximize performance from their LS-platform engine. This single-plane design is specifically engineered for high-RPM power delivery, making it perfect for street machines, track cars, and serious enthusiasts who demand responsive throttle character and broad torque curves.

The manifold achieves superior breathing by routing all cylinders through a common plenum, which creates uniform fuel and air distribution across all eight ports. This architecture minimizes runner length variation, allowing EFI systems to achieve tighter fuel mapping and more consistent combustion across the rev range. Designed for durability, it meets modern fuel injection requirements while maintaining the structural integrity needed for forced-induction applications or high-compression builds.

This manifold is purpose-built for LS3 platforms and is suitable for a variety of applications, from naturally aspirated road racing to turbocharged street setups. It pairs seamlessly with Holley EFI systems and other modern fuel injection controllers, enabling tuners to fully exploit the manifold's inherent flow characteristics through custom fuel mapping.