I have the Forge Twintake and Twincooler setup, was on the car when purchased. Setup maintains temps around 15C under WOT so not bad. However the twintake is a pretty loud and fluttery intake, there's far quieter ones out there and I've heard the flow's restrictive for k04 cars?
I like how loud the Forge is, can sound like a dump valve at times, i've had comments from people outside the car! But it can drown out the exhaust from inside the cabin :(