Originally Posted by
cossynut2
Polished alloy from Spec-R. There was a small hose but not sure why, but it makes more power with it off. Had no issues with it.
That would suggest that the air filter is holding back the power and that open hose allows enough air in to compensate? Obviously that is unfiltered and possibly hotter air from the engine bay?
I wonder what the small hose did? Something linked to emmisions / breather system I imagine?...or recirc but surely too small for that?