20-0391-02 Fuel Rail, S2000, 06-09 
This basic setup is contains the fuel rail and mounting feet only. It is a great option for custom fuel system applications. Fittings and adapters must be purchased separately.
 
20-0391-PK Fuel Rail Kit, S2000, 06-09
The plumbing kit includes the items shown in the image below and allows easy hookup to the factory feed line. All fittings are included to complete the installation.