The AVO Turboworld Black Silicone Radiator Hoses for the Subaru BRZ / Scion FR-S are different from the average silicone radiator hose. Manufactured from 4-ply silicone hose, AVO Turboworld further reinforce the lower radiator hose with wire for ultimate strength. This reinforcement is a necessary upgrade for performance oriented builds due to water pump cavitation.
Water pump cavitation happens at high revs on Subaru motors, and is a very common cause of overheating at the track. By reinforcing the hose with wire, it prevents it from sucking shut from the cavitation effect at high rpm’s. This keeps the cooling system working at peak efficiency.