Then Tarmac Sportz Nissan 350Z (03-09) Nismo N1 style lip addon is to be used with the Nismo N1 Style lip which is not included but can be purchased seperatley.
The splitter addon is to add that extra bit of aero to the front of your 350z while making it abit more agressive looking.
Please note this does NOT include the bumper lip, only the splitter add on piece. This has also not been tested on any other styles of bumper lips so please make sure you own a N1 style lip before purchasing.