With the Corolla compressor Toyota just slapped a supercharger on a 190 and hardly touched anything else- pretty much every one I've ever come across has had loads of problems in and of of Toyota- my dads was no exception. Intercooler and piggy back with a decent map and the car is completely transformed and a lot more reliable. My point is that Toyota don't always over engineer everything like we all think, especially when they offer these performance kits