Mishimoto MMHOSE-DATS-70RD Datsun 240Z Silicone Radiator Hose Kit, 1970-1975, Red Direct fit for 19701973 Datsun 240Z INNER DIAMETER: 1.38" OUTER DIAMETER: 1.73" Maximum Temperature: 330F Constructed with high grade silicone and heat-resistant embedded fibers Mishimoto Lifetime Warranty