ISR Performance Silicone Radiator Hose - Nissan RB25DET - Blue

The ISR Performance blue silicone radiator hoses for the Nissan RB25DET are part of ISR's silicone coolant hose line, made to withstand more heat and higher coolant pressure than OEM-style rubber. Silicone is a much stronger material than the original rubber, which keeps the hoses from expanding under pressure and from degrading over years of heat cycling.

Fitment details

• Nissan RB25DET
• Will only work with the stock intake manifold
• RB20DET: the top hose just needs to be cut to fit, since the 90 degree curve is not needed on that engine
• Color: blue (black also available)

Running an aftermarket intake manifold?

Check clearance first. These hoses are shaped around the factory RB25DET intake manifold, and an aftermarket manifold can change where the upper hose needs to route. If you have changed the manifold, confirm the geometry before ordering.

Fitting notes

Drain the cooling system, replace the hose clamps, and refill with fresh coolant once the hoses are on. Bleed carefully, since RB engines are known for trapping air in the system. The blue finish pairs well with an ISR aluminum radiator and an electric fan conversion.

All ISR Performance products are designed for off-road use only.