MGB 1800 Satge 2 Polished and Ported / Gas flowed cylinder head. This is for porting and polishing/gas flowing your own cylinder head. The ports are opened up and reshaped and polished for better gasflow, The combustion chambers are also polished and reshaped for better gas flow and combustion. The head retains std type valve but the larger inlet valve 41.3mm/1.625" and exhaust valve 34mm/1.340". New cast iron guides with a tapered nose are fitted. Please call 07973 325 328 for details on the machining your own head as we can tailor it to your own spec. UNLEADED VALVE SEATS FITTED. CYLINDER HEAD REFACE TO CUSTOMERS CC'S REQUIRED. NEW INLET…