* Improved heat transfer: Stainless steel has a higher thermal conductivity than cast iron, which allows it to transfer heat more quickly away from the exhaust tract. This can help to reduce the temperature of the exhaust gases and improve the engine's efficiency.
* Reduced risk of cracks: Stainless steel is also more resistant to cracking than cast iron. This is important because the exhaust tract is subjected to high temperatures and stresses, which can cause cracks to develop. Stainless steel liners can help to reduce the risk of cracks and extend the life of the engine head.
In addition to these benefits, stainless steel liners are also corrosion-resistant and easy to clean. This makes them an ideal choice for use in diesel engines, which are often used in harsh environments.