While the K&N was drying from its semi-annual clean , I went for an experimental drive sans-filter (empty stock box w/Ganzflow). I gotta say, its like an extra 5HP! I must be over-oiling that filter panel or something, because when I put the cleaned K&N back, there was a noticible loss 3-4HP. Gonna clean it again, then spray on tiny amount of oil. Anyone else had similar experience ?
I wonder if it is at the filter that Cobb takes the advantage.
-Ken