CAI=cold air intake. The it's a longer variation of the SRI=short ram intake. The CAI usually has a filter that sits farther away from the engine so it can pull in cooler air=better engine efficiency=more horsepower.
K&N is a producer along with Injen, and AEM. Take your pick. They are all the same concept and you may only see half a horsepower difference between the three.
Be careful with the CAI, with it being closer to the ground, usually behind the front bumper, you risk hydrolock which can happen if the intake sucks in water. Hope that helps a little. I have an Injen and opted not to intall the CAI extension.
K&N is a producer along with Injen, and AEM. Take your pick. They are all the same concept and you may only see half a horsepower difference between the three.
Be careful with the CAI, with it being closer to the ground, usually behind the front bumper, you risk hydrolock which can happen if the intake sucks in water. Hope that helps a little. I have an Injen and opted not to intall the CAI extension.