A Beast! I love the Viper it is one of my fav cars, this model especially so I had to do a tune. I made this car to be as raced out as it can get. It is much more stable and precise than normal, but still can get away from you if you don't drive it properly. I had it more stable and easier to drive, but the times were a decent amount slower so just drive this like you would any other race car. It is very fast and I think may be able to get up to 1000hp once fully broken in. The suspension is hard so either be careful on bumpy tracks or lower it a tiny bit if you want.
Also this car works great at the 650pp seasonal events. It has so much more power than everything else and keeps it fun since not as much downforce. I sometimes have a hard time winning these ones as there are a lot of cars that can reach 650, but for some reason not many are very good. This one is my go to now as it does everything great. Just powerlimit it down until it reaches 650pp.