i have changed my stock exhaust tips to quad tips. any good shop can do this for you for about 100-150 bucks. if anyone tries to charge u more, u are getting ripped off. those aftermarket tips are really cheap in the cost.
i have 02 valence so my tips need to be smaller as usually.
if u have 91-01 valence, u will get more choices. but if u want performance, sound, looking, go ARK instead of spending money on tips.
if u just want looking only, customized tips will be a good choice.