BBC Performer RPM 2-O Q-Jet Manifold - 396-502

The Edelbrock Performer RPM 2-O Q-Jet Manifold for 396–502 big block Chevy engines is a dual-plane aluminum intake manifold engineered to deliver broad torque output across a wide RPM band. Built with oval ports and designed for Q-Jet (square bore) carburetor mounting, this manifold optimizes cylinder filling efficiency while maintaining the thermal stability needed for sustained high-performance operation. The spread-bore design accommodates factory Quadrajet carburetors without requiring adapter plates, making installation straightforward on stock or modified big block applications.

The dual-plane runner layout isolates cylinder groups, reducing cross-scavenging and improving low- to mid-range responsiveness—a critical advantage for street-driven big blocks where driveability matters as much as peak power. Oval port geometry matches the flow characteristics of big block cylinder heads, minimizing turbulence and dead zones that rob efficiency. The natural aluminum finish provides a clean, professional appearance while offering corrosion resistance superior to cast iron. At 20.29 lbs, the manifold's weight is typical for aluminum designs of this displacement class, keeping overall engine bay mass reasonable without sacrificing structural rigidity required for sustained boost or high boost scenarios.

This manifold suits builders restoring or upgrading 396, 427, and 502 cubic-inch big block Chevy engines in muscle cars, street rods, and performance trucks where factory carburetor compatibility and broad-range torque delivery are priorities. The Q-Jet mounting eliminates expensive fuel injection conversion or carburetor adapter expenses, making this a cost-effective solution for traditionalists and budget-conscious enthusiasts who value reliable, predictable air-fuel distribution. The Performer RPM line's reputation within the Chevy performance community reflects Edelbrock's decades of intake manifold development—expect consistent casting quality and proven thermal characteristics across multiple engine configurations within the big block family.