This is the OEM Fuel Pulsation Damper Retainer that fits Nissan and Infiniti models equipped with a VQ37VHR engine. It is used to secure the FPD to both the left and right sides of the fuel rail. 

There are 2 required per vehicle. 

Sold individually. 

Fits:

• 2009+ Nissan 370Z (Z34) 
• 2009+ Infiniti G37 (V36)

Item location illustrated below.