aluminum cylinder head. engine no.: 300TDI Quality guarantee: 2 years or 50,000 kilometers Quality Certification : TS16949 The detail information of 904 0931. Engine type:300TDI***Our company was established in 1994, Which is a professional manufacturer for Aluminum Cylinder Heads. BY now we have more than 70 types of cylinder heads for Toyota, Mazda, Nissan, Mitsubishi, Fiat, Ford, GM, BMW, ...