According to the referenced article, the C&L intake manifold flows no less than 317 cfm per port. That calculates to no less than 2536 cfm for the entire manifold.Are you really that dumb?
CNL Performance did a lot of testing on products that they sell. They claim that the factory air filter and intake tube flows 550 CFM of air( 1 ). That is far more than the 225 CFM that the stock heads do and the 293 CFM that BBR ported 3V heads flow.( 2 ) That is also more than the 317 CFM that the C&L intake manifold flows which outflows the stock intake manifold.( 3 )
1) 05-09 Mustang GT C&L Air Induction System
2) BBR Stage 2 CNC Cylinder Heads - 2005-2008 Mustang GT
3) C&L Performance Three-Valve Intake Manifold Upgrade | Muscle Mustang & Fast Fords Magazine Article at Automotive.com
WRT the BBR article, it does not state whether the 225 cfm flow is for one intake valve port, for the 4 intake valve ports in each head, or for the 8 intake valve ports in both heads. However, the following article shows a flow of 156 cfm per intake valve port for the 92-98 4.6L 2-valve heads.
4.6 liter Ford Engine Cylinder Heads
Hence, one can intuitively deduct that the 225 cfm flow in the BBR article is also per intake valve port, or 1800 cfm total flow for both heads.
Hence it's quite apparent that the flows of the heads and the intake manifold vastly exceed the flow of the stock air intake, and thus calling them bottlenecks is a gross error.