We need a big banner on the home page that sasys "XUD Dturbos dont have an ecu and can not be mapped" 
But for the OP
Bosch
Stage one
Free flow exhaust I.E remove cat & back box (you prob dont have a cat anyway)
And if you fit an air filter put in a good place that wont get hot and can get a decent amount of FRESH air to it

But for the OP
Bosch
Stage one
Free flow exhaust I.E remove cat & back box (you prob dont have a cat anyway)
And if you fit an air filter put in a good place that wont get hot and can get a decent amount of FRESH air to it