This set of Samco hoses is designed for the JDM Evo 4/5/6. They can be used with the Evo 7/8/9 if you are running the Evo 4/5/6 style radiator.
The upper hose will fit the STM Billet Aluminum Radiator and 4/5/6 radiator in a 7/8/9.
The lower hose will NOT fit the STM Billet Aluminum Radiator or any factory style 7/8/9 radiator.
The lower hose ONLY fits 4/5/6 style radiators in an Evo 4/5/6.
The lower hose will not fit any 7/8/9 models.
Samco only sells these in pairs, so unfortunately if you only want the upper hose, you have to buy the set.
The upper coolant hose is a straight across shot over the right side of the engine bay instead of snaking from the center like the factory 7/8/9. This frees up space for larger exhaust manifolds.