It isn't terribly competitive at 450PP tbh, but I just did a quick 425PP build on it and got a 7:40.464 on the Nurburgring on my first attempt, so its a perfectly decent track car and handles just fine. The only down side is its top speed, which is in the 140 mph region, but here's the tune :
RS Tyres (personal preference)
Oil change
Race brakes : 6-4 bias
Race suspension :
Height : 95-95
Springs : 5.00-4.00
Dampers (C) : 4-4
Dampers (E) : 4-4
Anti roll : 4-4
Camber : 0-0
Toe : 0-0
Race gearbox :
Auto setting - 149 mph
1st : 3.500
2nd : 2.350
3rd : 1.700
4th : 1.300
5th : 1.040
Final : 4.300
Diff :
Torque : 30-30
Accel : 60-60
Decel : 5-5
Centre diff :
20:80 split
Power upgrades :
Stage 3 engine
Sports comp.
Race exhaust
Race manifold
Race cat
99.1% limiter
Full weight loss package +
200 kg ballast all the way to the back.
425 PP
301 bhp
1,448 kgs
51:49 weight balance
Hope this is useful for you.