Direct Connection ( Mullen LA ) heads

@moparallen
Back cutting the intake valve is great for next to no overlap cams with lift in the .400's....Or stock head/cam stuff.
1 down side ...It helps reversion back up into the intake manifold when the overlap is intro'd and increased as the cam gets bigger
The higher lift doesnt respond so much to it too. Ime. Telling .

Take and flow your port without a valve.
Plug the guide, its only 7 cfm that guide flows btw. If it flows more, you have more work to do or you ruined the port.

If it flows less without the valve, you're doing it right.