3-PLY SILICONE RADIATOR HOSE HIGH TEMP PIPING 93-97 MAZDA RX-7 FD3S TURBO BLUE 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: 1.25"/ 1.25" Hose Thickness (Approximate, Varies due to Bending): 3-Ply/ 4.00mm Size (Diameter) Tolerance: +/- 0.225" Application: 93-97 Mazda RX-7 FD3S S6/ S7 (1.3L R2 13B-REW Engine Models ONLY). Modification (Cut) might be Required for Some Vehicles