I am looking to buy a Greddy Evo 2 exhaust system for my 99 civic si. I was wondering what you guys think of it. Is it worth buying? What do you think is a good price on these? I found a site that's willing to ship for $508. Is that what it usually go for? My car is stock and i don't plan on turbo-ing my car anytime soon. What kind of intake would you suggest me buying? Thanks!