ISR Performance Black Silicone Radiator Hose Kit Nissan 350z 2003-2006

The ISR Performance Silicone Radiator Hose Kit for the 2003-2006 Nissan 350Z in black is a two-layer silicone replacement for the factory rubber radiator hoses. Higher heat range, higher pressure tolerance, no expansion under boost or sustained heat soak. Cleans up the engine bay while it cleans up the cooling system reliability.

What It Does

Factory rubber radiator hoses expand under coolant pressure, especially as they age and the rubber softens. That expansion is small but real, and over time it contributes to inefficient cooling and eventual hose failure. Silicone hoses are stronger than rubber and resist expansion entirely, holding their shape through the full range of operating temperatures and pressures. The two-layer construction adds an additional safety margin against burst pressure. Also adds a clean visual touch to the engine bay. available in black, blue, or red.

Fitment

Designed for the 2003-2006 Nissan 350Z (Z33 early production). For the FR-S/BRZ silicone radiator hose kit in blue, see IS-RH-FRS-BLU.

Product Details

Brand: ISR Performance

Part Number: IS-RH-Z33E-BLK

Type: Silicone radiator hose kit

Color: Black

Vehicle Fitment: 2003-2006 Nissan 350Z (Z33)

Construction: Two-layer silicone

Replaces: Factory rubber radiator hoses

Color Options Available: Black, blue, red

Sold: Complete kit

Legality: Off-road and competition use only