I wouldn't do it on a car you drive everyday, but if I were building a racecar I would defenetly strip out the interia. On a street car you would be giving up a lot of conveniences, it also sounds like something someone with a Civic would do. You might think about putting a "REAR SEAT DELETE KIT" in your car I've read that they save about40 to 50 pounds, I've seen them on EBAY for about $100.