These highly stressed engine parts can suffer excessive wear on the operating surface over years of service. When any part of the valve gear breaks, it always means engine out and head off, sometimes even a complete strip down if metal has dropped into the sump.
New rocker arms helps soothe those doubts, and when used with new genuine factory valves and valve springs, help ensure a reliable valve train.
Worn rocker arms mean reduced performance and a noisy top end rattle. Try the same gasket seal used by the factory - 08C70K0234M - for a more professional result!