Could someone explain to me what is the diference between the Aircharger 63-1534 and the FIPK 57-1534. From what I can tell form the pics on K&N's web page they seem extremly similar yet the 57's fits all 2nd Gen Neons and the 63 only fits 2005 Neons.
I looked at the installation instructions and the only difference I could tell was that the in the 57 series the IAT is conected to the filter and on the 63 series the IAT is not moved at all. The filter sizes are exactly the same. So is there a performance advantege from one over the other? and why 63 series fits only 2005 and not all 2nd Gen Neons?

 

From K&N website

A sister product to our 57 Series FIPK, our 63 Series Intake Kits or AirCharger® Intakes are built for many different vehicles and represent a dramatic improvement over a K&N O/E replacement filter alone. They enjoy a faster speed to market than our 57 Series kits due to their pending CARB status. These intakes use only non-metallic rotationally molded tubes that can reduce intake air temperature and decrease intake sound over a metal tube. Restriction can exist BETWEEN an air filter and the engine reducing the benefit of a K&N Air Filter. The weakest link in the airflow "chain" robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the Engine. K&N Air Intake Kits virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER. 63 Series Intake Kits are not legal for street use in some U.S. states. [MORE]


Hope that helps. Same same just not CARB approved yet.....

 

Then why does it fit only 2005 models? At least thats what K&N's webpage says.