there are a few other brands, but i dont remember them. The eibacs are well worth the money though. small drop in height and a decent price. i paid 230 for mine.

and kore takes forever to ship stuff too. It took 6 months to get my exhaust and 8 months to get my intake. If i were you id go with a custom exhaust. its pretty quick, my times are in my sig.

btw i HATE sharkracing. absolutely hate them. Im friends withte guys at kores o i stick with them unless i know i can get something faster and is just as quality. a good place to look would be www.keyperformance.ca

they've got some good stuff, keep in mind though that the prices are in canadian.