A Turbo 350z and Sentra info is my website. I once owned a turbo QG.
that TSI extreme kit isn't specifically for the QG18DE. The fitment will be poor and quality is even worse.
check my website for some info.
Gregor, if you're talking bhp, at 250whp you'd probably be on the ragged edge of blowing the stock motor. Using a lightweight flywheel on a turbo car isn't optimal because you loose the rotational momentum between shifts, causing a momentary lag of power as the motor catches up.
For 200+ wheel horsepower, on stock internals, I'd definitely use 2 step colder plugs. There are no reflashes.