Honda Civic is already a beautiful car that doesn’t need modifications but when you see the rebuilt car by Mugen you will change your idea.
They have given the engine more power by removing the original pistons with different aftermarket ones. Exhaust system has been changed. A stainless steel system is used for the Honda.
The air filter has also been changed to enhance the performance of the car. To achieve better performance the ECU has been re-tuned. Differential too has been changed to achieve better performance. Finally the wheels will also be changed. It is an all new Honda Civic.
Source: fancytuning.com