Hey guys I just bought a 2003 mazda 6 4 cylinder and I've been wanting to start modding cars and I was wondering if anyone had any tips or suggestions for what mods I should do. I know how to do a little more than the basics but I wouldn't be able to do an engine swap or anything major like that by myself. I plan on keeping this car for a while if I can get it to run and sound how I like so any suggestions?