Genuine Audi - Coil Spring Insulator - Front - Upper - TT Mk1 heating and are designed to be

and are designed to be completely rebuildable with replaceable Density Line rubber bushings

This means the hoses are suitable to be used with  either modern long-life coolants

Constructed from 4-ply high-temperature automotive grade silicone

5″ allowing for increased flow and greater performance

Genuine Audi - Coil Spring Insulator - Front - Upper - TT Mk1 heating and are designed to beYour coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your Mk1 Audi TT might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Replace your coil spring insulator while replacing the springs.