I am just going by what the web cam folks said. Does anyone have specs for the 115? They dont have them on their web sight. They do have the 148e specs. I have heard from two shops that the 148e's dont give much of anything for performance over stock. Web cams said the same. Without the lift and duration curves to compare of all (3) the 148e's, and the 148e +3's, and the 115's we really dont have much to compare. What they have stamped on them really does not tell you much. Unless you believe everything you read.