When I took the car down when it was in my brothers ownership I managed a 11.5 pass @ 122 mph with a 98 tune and 425 hp ath. What makes it even better the centre diff was fucked as it wouldn't hold power above 450 hp ath hence 425 was just about right before it would slip. Also the over rated carbon r clutch that was in there at the time and 260.000 Km driveline held well.

No doubt with 550+ it will hook a 10 no worries.