This kit is made of stainless steel pressed lines and -3AN fittings. The kit comes with all stock fitting to make these compatitible with your MAP MR2 Spyder Brakes. Unlike other's, this kit allows for upgrades to be made in the future without replace the entire kit. Often time's it is just one fitting that is different when switching calipers due to a upgrade, why buy a new brake line kit when you can just purchase a $5 fitting?
The stock rubber hoses expand as pressure is applied, a less not solid feel. Rubber is also prone to damage from road/track debris which can be a safety hazard; stainless braided hoses are much more durable and prevent expansion.