Broken down, the set is a front spoiler, side skirts, plus a combination sports muffler & rear defuser. A set of 19-inch forged aluminum wheels are also available:
As for price, the body kit including the muffler set is ¥386,000 ($3,440 USD). Not a bad deal considering the 19-inch wheels are ¥472,000 ($4,200 USD) all on their own.
(Currently offered in Japan, no word on availability in other regions.)