don't know the rules but your best choices for a good suspension kit are dms 40mm golds, leda b's, cusco (depends on what you want), and sti/fhi setups. But before you go spending big money on that stuff get bigger sway bars, front and rear strut bars, anti-lift kit, and better tires. If you still need more after that then go for the kits.
later..
Robert :nuetron: