This goes up as the square of the road speed. So you get four times the pressure force at twice the speed. What this really means is that the engine has an easier job sucking the air in, hence making it more efficient and therefore more powerful. The second benefit of the ram air pipe is that cold air is fed into the engine from outside the car instead of under the bonnet where temperatures are high. This means that the air entering the engine is more dense because it is colder and again it is then easier for the engine to suck in the amount of air it needs. So, in summary, what the Essex Racing Induction kit does is help the engine to gulp in the air more efficiently - hence more power. We use this technology on our race cars, and now you can use it on your road car. The products consists of: 1x Black or silver ram air pipe