It's a turn-key race car straight from the factory which distills the Viper ACR down to the performance essentials, while adding in some of the features found on the tube chassis Viper Competition Coupe. Anything remotely close to being considered a luxury amenity is out, such as air conditioning, interior trim panels and a passenger seat. In place of those items are the race seat from the Competition Coupe, aero upgrades, a fire-suppression system, Michelin race slicks, a Momo steering wheel, a roll cage, a stiffer KW suspension, upgraded brakes, a transmission cooler and more power.
The heart remains the 8.4-liter V10, which gains forged pistons, a new PCV system, headers and freer flowing exhaust. It loses its catalytic converters to produce an additional 40 hp and 45 lb-ft of torque for a total of 640 hp and 605 lb-ft of torque. That, along with the 160 pounds of weight lost compared with standard production Vipers, aero improvements and tires, make for thoroughbred track beast.
With current-generation Viper production ending this summer, the ACR-X is the most hard-core limited-edition version that Viper Nation will be able to get their hands on. It's so hard-core that it's not street-legal. Twenty-five people have spoken for the first batch, with a second batch of 25 cars being considered for production if demand warrants.
The cars are eligible for the STO category in the SCCA with a restrictor and in a newly developed Dodge Viper Cup spec series that will be sanctioned by the Viper Racing League. The season kicks off the weekend of July 9 at Virginia International Raceway in Alton, Va., and will be followed by four more events, each consisting of two races. Dodge Motorsports and Mopar plan to put up more than $200,000 in prize money and Mopar parts vouchers for the season.
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