G'day guys. Newbie here and what a great thread to read. The PW stage1 is my choice so far. Mainly because it states no cutting etc to fit. I'm new to Turbos. Always been a V8 driver and recently traded the BF Pursuit for a brand new FG MKII turbo. Delivery took place mid December and I noticed the difference the car feels like in the hot weather. Out of curiosity I had it dynoed at 3k and it pulled 235rwkw. Took it to Calder and ran a 13.36 1/4. 60ft was 2.1 I think it was? I'm thinking about a bare minimum upgrade and if the new cooler would make a difference in the performance without a tune or anything else? Or do I have to tune if I fit one? Cheers. GTint.