I was running a 120+ MGZS but I had upgraded the exhuast with a sport decat and staight custom exhaust and a BMC induction kit.
It sounded great but in truth compared to the WRX I drive know it was nothing.
I have a Grey Import V Spec running around 300 bhp though I need to have this dyno tested as I have unfortunatley run this on 95 Octane fuel not knowing that the ECU adjusts power to compansaite for fuel quality.
Since I have discovered this I have been running the car on 100 Octane fuel hoping the ECU will re-adjust.
Being a Jap Import I don't have the folding rear seats its a secure bulkheaad give it more strength apparently and has less roll.