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The intake manifold was fully ported at Indy to enhance its airflow. It's surprising how many builders will neglect manifold flow even while heavily focused on cylinder head flow numbers. The experts at Indy realize that an airflow system is only as good as its weakest link. Builder Ken Lazzeri noted, "The intake had to be compromised some for hood clearance and overall height, but the porting made up quite a bit of ground."