Head gasket used in PERKINS A4.107 engines - 1 piece. (3-layer reinforced) Head gasket used in PERKINS A4.107 engines - 1 piece. (3-layer reinforced) PARAMETERS bore diameter: 82 mm ENGINES PERKINS A4.107 MODELS MASSEY FERGUSON machine model: 130, 122, MF25, MF30, MF31, MF130, 825 PERKINS engine type: A4.107, 4.107, A4.99 RANSOMES SIMMS & JEFFRIES machine model: 801 AEBI machine model: transporter TP 50