external wastegate control

dear all,
what is the best way to control the ext. wastegate with the m4???
control bothe sides??
and what for a elecrical 2way valve? air injectors?
many thanks for your help
regards
karl
what is the best way to control the ext. wastegate with the m4???
control bothe sides??
and what for a elecrical 2way valve? air injectors?
many thanks for your help
regards
karl