The AFR Magnum Dual-Plane Intake Manifold is engineered for performance Big Block Chevy engines with a standard 9.8 in. deck and rectangle-port cylinder heads. Developed around AFR Magnum rectangle-port cylinder heads, the as-cast aluminum manifold provides an optimized intake tract for street and marine applications with engine speeds up to 6,500 RPM. Its dual-plane design supports broad power delivery while the 4150/4160 carburetor flange provides compatibility with common square-bore carburetors.

AFR 4913 Features:

• Fits Big Block Chevy engines with a standard 9.8 in. deck
• Dual-plane intake manifold design
• Rectangle-port configuration
• As-cast aluminum construction
• Designed for 4150/4160 carburetors
• Suitable for street and marine applications
• Operating range up to 6,500 RPM
• Unmachined port nitrous bosses
• Two distributor clamp locations
• Multiple front and rear coolant bosses
• Sold individually

AFR 4913 Notes:

• Best fit for AFR Magnum 305cc, 315cc, and 325cc rectangle-port cylinder heads
• May require porting when matched to other cylinder heads
• Use with AFR Enforcer or non-AFR cylinder heads may require machining of the intake manifold or engine block