It really doesn’t take much to optimize the Dodge Viper for track duty, but Dodge decided to make it easier starting in 1999 by offering the “American Club Racing” version of the Viper coupe, ready off the lot for autocross and road racing duties. Thanks to improved breathing, the engine puts out a total of 460 horsepower, and the removal of road ancillaries deemed unnecessary for track use was tossed. With less weight, more power, and the addition of stiffer adjustable suspension, the Viper GTS ACR is a turn-key racing solution that doesn’t skimp on performance—the 8-liter V10 can catapult this Dodge to 60 mph in a hair over 4 seconds, and pull nearly a full lateral G in a skidpad. With that kind of performance, you can guarantee that the Viper GTS ACR won’t be boring in the least. The 1999 Dodge Viper GTS ACR - abbreviated as Dodge Viper '99 - is an RWD sports car by Dodge featured in all Forza main titles except Forza Horizon. It also appears in Forza Horizon 2 Presents Fast & Furious as an AI opponent. The Viper GTS ACR was a track-oriented model of the first generation Dodge Viper GTS coupé. First introduced by the 1994 Dodge Neon ACR, the ACR (American Club Racer) package added a stiffened suspension, power increased to 460 hp (343 kW) and removed weight by omitting the audio system, air conditioning, and fog lights. The ACR package became available again for the 2008 Dodge Viper SRT10 ACR and 2016 Dodge Viper ACR.