This is a used cylinder head from a Super Custom 46 with a missing cooling fin.
SUPER CUSTOM 2 STROKE EXHAUST 41mm M3 TAPPED CENTRES FITS SUPER CUSTOM ETC
SUPER CUSTOM 2 STROKE EXHAUST 49mm M4 CLEARANCE CENTRES FITS SUPER CUSTOM ETC
SUPER CUSTOM 70 4 STROKE AERO GLOW ENGINE IN GOOD CONDITION
SUPER CUSTOM AR-52 4 STROKE AERO ENGINE WITH SILENCER IN GOOD CONDITION BOXED
SUPER CUSTOM AR-52 4 STROKE AERO ENGINE WITH SILENCER IN GOOD CONDITION