I think its this?
1 set of 4 pcs silicone replacement heater core hoses for all 2009+ 370Z and G37 models.
These hoses carry coolant between the metal inlet and outlet tubes on the heater core that stick out of the firewall to the metal tubes on the back of the motor.
4 ply reinforced high quality silicone hoses, custom formed for perfect fitment like the stock hoses.
These are the last heater core hoses you will ever need. Unlike conventional stock rubber hoses that deteriorate over time, dry rot, and ultimately crack this silicone hose will stay soft and never degrade. Best of all they cost less than new OEM rubber hoses!
Z1 Motorsports offers a full line of silicone hoses for the 370Z and G37 that will be the last hoses you will ever have to purchase. There's no reason to consider anything else.
Hose sets are available in high gloss Black, Blue, or Red