3-PLY HIGH TEMP SILICONE RADIATOR HOSE FITS 75-78 DATSUN 280Z Z S130 L28 RED Made with high quality silicone and 3-ply nylon for enhanced strength and durability. Increases engine performance and efficiency with high temperature (up to 330 Degrees Fahrenheit) and high boost application. Hoses Inlet/ Outlet Inner Diameter: 1.375"/ 1.375" Hose Thickness (Approximate, Varies due to Bending): 3-Ply/ 4.00mm Size (Diameter) Tolerance: +/- 0.225" Application: 75-78 Nissan (Datsun) 280Z S130 (Fits Manual Transmission Models with 2.8L L28E 16 Engine Only). Modication (Cut) might be required for some vehicles.