supra turbo mk3 tuning

[wesbam1]

thanks for the info never thought the engines would be that strong ,head gasket was replaced at 65000 its only on 70000 genuine miles now would the standard gasket last with just the 3inch exhaust done on its own as I will use a mhg when I up the boost on the turbo,do Ineed to chip the ecu or does the boost controller do this anyway, are the fuelling fpr ,pump , injectors ok as stock .one last question honest,will the standard cooling system be ok at 300 hp.as you can tell im completely new to the world of turbos ,thanks for the help.dale