If you want to get away from LAG CITY that is escy, then mod the head, by DE SHROUDING, the best £275 you will ever spend on bang per buck, it does not increase BHP , but my god the torque curve is MONSTROUSLY DIFFERENT.
I did this to mine(2wd sapph, T3/34) get on 803's 150lbft@1500rpm, 330lbft@2200rpm, but STILL 330lbft@6500rpm!!
The way it pulls to 7300rpm in top is amazing, just keeps accelerating hard all the time as the torque is there, no downside at all, so long as you discount the rear tyres not lasting!!
tabetha