Flamingsam is right I don't normaly get involved in these convos cuz everyone normally jumps down my throat I ran 1.8 for over two years admittedly not on purpose to begin with (vast boost creep) And yes higher up the revs it did start to drop off power like all ct9's but the acceleration was immense as like most ct9's hit full boost at like 3k rpm and my car still runs beautifully even now and just had a td04 fitted and the ct9 was bang on when me and mike had a quick look at it at tuning developments when Sam drove it it was at 1.4 and still very nippy