Detail Suits M104.990 engine onlyHead 31mm x length 103.5mm x stem 8mm x 1 grooveclearance item ex valve merc m104.990 m-31.00-103.50-8.00 Mercedes-Benz Car SL320 (R129) (M104.991) with a M104.990 M104.991 M104.992 M104.994 M104.995 engine.