MORE air in and more air out = HP. But whith the GT3 throttle body and
plenum I would think you would have to upgrade the entire
PLenum off maybe a 3.6 to get the full monty. But no doubt you will see improvements. I did with the IDP and as far as
Softronic ? I hear one thing then another. I'm going with REVO myself right or wrong we can only learn. Either way I bet you are going to be happy besides it's your dime and your ride. Good luck