BBC EFI Intake Manifold 4500 Flange w/Fuel Rails

The Racing Head Service BBC EFI Intake Manifold 4500 Flange with Fuel Rails is a high-flow, single-plane aluminum intake designed for big block Chevy engines demanding maximum performance. This complete kit ships ready for installation, combining the manifold body with integrated fuel rails to streamline EFI system integration on classic and modern big block platforms. The natural aluminum finish provides excellent heat dissipation while the 4500 flange mounting standard ensures broad compatibility across contemporary EFI setups.

The single-plane design optimizes cylinder charging by delivering fuel and air in a tuned sequence that favors peak power over a wider RPM band compared to dual-plane alternatives. Rectangle port geometry maximizes flow capacity for large-displacement big block applications, critical for builds targeting naturally aspirated or supercharged output above 500 hp. The included fuel rails eliminate sourcing complexity; this kit consolidates manifold, fuel distribution, and mounting hardware into one verified system, reducing fitment guesswork and installation time. At 25 lbs, the aluminum construction keeps rotating assembly mass low while maintaining thermal stability during sustained high-load operation.

This manifold suite targets big block Chevy engine builders committed to EFI conversion or new-build fuel injection systems. Whether upgrading a street application, pursuing track duty, or restoring a classic with modern fuel delivery, the 4500 flange standard and single-plane architecture align with contemporary EFI harness and injector sizing. Builders selecting a Racing Head Service manifold prioritize flow integrity and proven design over generic aftermarket alternatives.

Single-plane intake manifolds have dominated high-performance big block development for decades, particularly in naturally aspirated and boosted applications where cylinder-to-cylinder charge distribution and peak horsepower matter most. The 4500 flange became the industry standard for EFI applications, ensuring broad injector availability, tuning support, and fuel system component compatibility across the modern big block ecosystem.