Hi chandrasekhar, there are some options to increase the ground clearence 1) Increase the tyre size from 175-70-R13 to 185-70-R13 and 2) Upgrade from 13" inch tyres to 14" inch tyres & Rims, but this will be effect your Speed & odo reading. However the low ground clearance is fuel economic as the lower ground clearance allows improved aerodynamics which plays the major factors in fuel economy.
Certainly, you can get your car modified as per your choice. Coming to the front grill, you can replace it with the different grill. For that, we suggest you to get in touch with the authorized service centre as they will be the best people to suggest you few compatible grills to choose from.
Click here to find the Honda service stations by selceting your city in the drop down list.