I did it last night with an EVO X. Sport Soft tyres and semi-Racing exhaust were the only performance mods I did to it, other than that bodykit, rear wing and carbon hood for looks. I pitted every 25 laps, the car munched front tires.
Be very careful when entering the pits, the turn is veeery tight, and I mean 20 Km/H tight. Do it wrong and you'll crash.
My only competitor was a C5 Corvette Z06, it pitted every 40 laps or so and had a hellish pace on the straighs (no wonder, I just had like 330 HP) but I ended up winning by 1 lap. Overall, it was fun enough. Remember to take a rest as well in the middle of thr race, that way you'll feel you're almost done with the race and you'll let your wheel cool off (my G27 was already feeling really hot).