I've been trying get a turbo setup so I'm very concerned (if I ever get it running) about air flowing to the radiator.
I was wondering how a splitter would affect the air flowing thru the radiator hole?

The intercooler sits directly above the front of the bumper where the splitter operates

 

A splitter typically creates a high pressure zone directly above it and against the air dam with a low pressure zone below it. If you vent the hood behind the radiator and create a low pressure zone there it would probably help pull air through the radiator. Of course that would lower the pressure differential across the splitter thus reducing its effectiveness.

 

A splitter should enhance the airflow through the radiator due to the higher pressure air above the splitter.

 

^ this

 

We recommend WASP composites if you need a good splitter..