The problem with the original air box, is the momentum of air delivered to the engine, as well as ambient temperature around the air intake. The original system picks up a hot air from the 3 opening. Our system involuntarily receives its air without restrictions-360 degrees, right from under the side-open grill. Also note, the engine 's power drops 1% for every 10 degree rise in temperature. On larger engines the drop is insignificant. On smaller engines the problem will weaken the engine at higher rpm levels. The performance difference demonstrated by our system is noticeable at higher rpm levels, when more air is required. Using the original dove tail screw, our system attaches easily to the same place as an original air box. The aluminum bracket is shaped to allow the air/flow meter to be at the same position and the same angle as it was with the original air box, thus preventing s-shape boot from changing it s position.