Turbo upgrade

[special-ed-220]

Hey guys need expertise from anyone who has done a turbo upgrade.

Online I have read and seen a lot of different companies offering many different upgrade options.

What do you recommend?

The gt28r turbos look good?

The atp 450 is pointless I have read.

I like the looks of the gt28r upgrade as I think the ko4 won't push the power increase I would like.

I am not very mechanically minded so if i went for the gt28r what other add ons would i need exactly?

Fmic? Hpfp? Bigger injectors? Etc,

Or if you could recommend a different turbo upgrade and parts would be helpful?

I would like to push 320-350bhp if possible?

Thanks

[Crasher]

I don't know which specific car you have but guessing it is a Golf 5 GTI with an EA113 engine I would suggest the APR K04 system, their GTX2867R is silly money and really needs four wheel drive. The advantage of using a system is off the shelf software and it makes the job easier.

[special-ed-220]

Sorry I did not realise I hadn't specified the car.

It is an audi a4 2.0tfsi quattro special edition.

It already had revo stage 1 remap.

[Crasher]

Which year and engine type code?