For the simple and good budget u can install the microtech LT8s or LTX10s come with X4 box and Bosch 4 coils.For the NA engine u can get 15 to 25% horsepower and the turbo engine can get 40% horsepower depent on your engine condition.
LT8s complete with installation and tuning on the dyno(for 1st hour only) RM3800
LTX10s complete with installation and tuning on the dyno (for 1st hour only)RM4000
We got the Dyno Facility.And u can see the Data and Horsepower.