I just can't see the scoops making a difference because of the way the airboxes are designed.
Here's the thing: On my E60 M5, there were two paths into the airbox. There were the holes from in front of the radiator (clearly a higher pressure zone) and the ducts from the brake ducts. The RPI scoops on that car are best when you block off the other path into the airbox.
The M3 has 3 pathes into the single airbox, the front scoops, the hood vent and the brake duct. I simply can't see pressurizing the box at all with 2 other paths out, especially with airflow going over the car, that most people without a wind tunnel can't simulate in most dyno cells.
But what do I know?
