This Nissan 300zx turbo coolant hose is located beside the left side turbo and exposed to substantial heat. Over time the heat breaks down the stock rubber line eventually resulting in failure. This silicone turbo coolant line will not break down because of the heat. This is last turbo coolant hose 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 not degrade.