Exactly what Pedro said..
I ended up e-mailing CJ directly and he was really helpful in getting them sent across the water, took 5 days in total..
He will be able to tell you which calipers they will fit, the ones I have (993TT) are four pot, two small pistons should be the leading piston therefore the top piston when fitting them to your car. I spent a little bit of money on some Pagid RS4-2 pads but any pad that fits these calipers is going to be up to the job, I was going to buy the rear calipers off a Cayenne but have decided to stick with standard Volvo discs and pads as the whole set up is awesome. Definitely get braided lines and some decent fluid and you will be very happy with high speed braking!!
Scott..
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