The 473INT EC Intake Manifold is designed to fit 28mm Spigot Mounted Carburetors to Briggs & Stratton Animal and LO206 Heads, This is not a direct fit on World Formula Heads.

These intakes are designed and CNC machined to match each unique intake port shape precisely at the entrance of the block or cylinder head. The resulting action is no turbulence causing misalignment and much better control of the laminar flow in the entire intake tract. Pulse hole is precisely located for increase pumping action at high RPM. All install hardware included.

Manifolds Specs:
• Fits Predator 212, Clone 196(6.5hp), Honda GX200, Ducar 212, and Tillotson Cylinder Heads
• Spigot OD 34.5mm
• Spigot ID 27.25mm

Due to different brands(originals and knock-offs) and models you need to check your ID and OD of the spigot on your carburetor. You may need to sleeve or port match your carburetor and intake to make it an exact fit.