Vauxhall Astra MK4 GSi Z20LET Standard OD Top Hat 1998-2004 Hybrid Silicone Hose Application Vauxhall Astra MK4 GSi Z20LET Standard OD Top Hat Hose kit type Hybrid Silicone Hose Qty of hoses 0 This Vauxhall Astra MK4 GSi Z20LET Standard OD Top Hat Hybrid Silicone Hose is made to the highest standards of quality and durability by renowned UK manufacturer Roose Motorsport. Designed for high performance and reliability, it’s ideal for replacing old rubber hoses in your vehicle and adding a sleek new look. Choose from a wide range of colours to suit your car, allowing you to create your perfect custom high-performance cooling plumbing solution. You can also choose between a branded or unbranded finish. This Vauxhall hose kit also comes with a lifetime guarantee.