[TurboKraft]

We can see the aftermarket headers, and I assume it has a free-flow muffler as well.
Does your engine have an upgraded intercooler, too?
Cams?
Clutch?

Install a GT35R and you'll be delighted with the response and power.
TurboKraft can sell you just the turbocharger, or a complete package with every installation piece you'll need to fit it to your 930, right down to a stainless heat shield for the turbine housing.