not sure how much you spent on your system but you could always get a better system most likely up grade your speakers i do sq system installs i could lead to the right direction to getting the best stuff if you got the money or better not sure what you really have though in your system. They also make a billet grill now i heard
http://sestrims.com/v3/toyota-coroll...0-p-16114.html
thats somthing im getting soon but still trying figure out how to make the s badge stick onto the grill before i buy it.
I got the enkei rims for the car i got its looks good enough for me although alot of the corollas will have them they still look tight to me thats all that matters. Also look into sound deadening your car with some dynamat extreme to keep the car more quite. Do they whole car will cost money but trying to give you ideas here of what i am doing to my car. look into upgrading your battery with a kinetik battery they make the best for car audio in my opinion. upgrade your big 3 tto your car to have better current flow of electric and to have less noise and might make idle down lower.... maybe. You could always do license plate frames or leds... i am not doing mine but another option for you. Led underkit might be another option for you. Since there are no performance things out yet when there is i would suggest cold air intake, headers, exhaust, cat back system. thats all the performance i will be doing to my car. good luck hope some of the thing si told you will help your journey or spending crazy money wish i had it.