These kits are the ultimate upgrade for the oiling system on most Evolution Sportster models 1986 to present, Evolution Big Twins 1984 to present and Twin Cam models 1999 to present. The oil lines feature aircraft quality PTFE inner tube and braided stainless steel outer, using stainless alloy G-lite fittings. Each kit is tailor made for the specific application and quality inspected to assure leak proof and easy mounting. Seals for the oil line-to-tank fittings are separately available. These seals must be replaced every time the oil lines are disconnected.