I'll add to the dead post.

Even though the Mugen Civic Si is sold at $30k, you have to keep in mind that all the Mugen parts and the car itself has a warranty. Not bad considering the dealership/Honda will warranty performance street parts. The car is tuned on Twin Ring Motegi so it is track ready while being streetable. Even though it is a $30k Civic, it isn't just the name brand parts that make it sound overpriced.