I am very interested in getting an 08 civic hybrid.

I am young and care about the environment and getting good mpg

I have a couple questions though.

I know it is not advised, but how would a body kit affect the car? I would be putting on a 08 civic mugen body kit. Also, how would rim and a sound system affect the car? by sound system i mean an amp and one sub.

I realize it will lower the mpg, but by how much??

Thank you very much everyone!!