Basic: 3 yr. / 36,000 mi.
Drivetrain: 3 yr. / 36,000 mi.
Roadside: 3 yr. / 36,000 mi.
Rust: 5 yr. / 100,000 mi.

Basic Warranty: The basic warranty covers everything except items that are subject to wear and tear or replacement in the ordinary course of vehicle ownership, such as oil and air filters, wiper blades and brake pads. Tires and batteries are often excluded, but usually have their own warranty provided by the manufacturers of those items. Emissions equipment is required by Federal law to be covered for five years or 50,000 miles.

Drive Train Warranty: In some cases the drive train warranty continues after the basic warranty has expired. This part of the warranty covers most of the parts that make the vehicle move, including the engine, transmission, drive axles and driveshaft. Like the basic warranty, "consumable" parts such as hoses and belts are not covered. However, most of the internal parts of the engine, such as the pistons and bearings, which are also subject to wear and tear, are covered by the drive train warranty.

Rust or Corrosion Warranty: This warranty covers the vehicle's sheet metal, and protects you from rust and corrosion that are severe enough to cause a hole - surface rust is not covered. However, if you keep your car washed and waxed rust shouldn't be a problem.

Roadside Assistance: Many manufacturers provide a service that will rescue you if your car leaves you stranded, even if it's your fault. Lock yourself out of the car? Run out of gas? Got a flat tire? A call to the manufacturer's toll-free number will result in somebody showing up who can help you out. There is a huge variance in these programs so check ahead of time to see what is covered and what you will have to pay for.

The ACR has exactly the same power and torque as the regular Viper-600 horses and 560 pound-feet. The engine drives through a smaller dual plate clutch that reduces rotating inertia by 18 percent and the latest iteration of the Tremec T6060 six-speed that includes triple-cone synchros on first and second, and 10-percent-wider gears to manage the torque. The new GKN ViscoLok diff features its own sump to quicker generate the hydraulic pressure needed to actuate the limited-slip clutches faster, yet more progressively and with greater precision.

Most of the time, effort, and development dollars have been spent on stuff that makes the ACR go faster through the twisty bits-suspension, brakes, wheels and tires, and aerodynamics. Especially the aerodynamics. Just chew on this for a moment: At 150 mph, the regular Viper coupe generates 100 pounds of downforce; at the same speed, the Viper ACR generates 1000 pounds of downforce.

That giant carbon-fiber rear wing is the most obvious reason why. But there's also a new carbon-fiber front splitter that extends way back under the car and incorporates seven steps to diffuse the airflow. The new hood louvers unveiled with the 600-horsepower engine upgrade a year ago play a part, too. "We knew we were going to do a new ACR, so we moved the louvers forward to help change the aero balance of the car," says SRT boss Herb Helbig.

Suspension changes include race-style KW shocks all around that can be adjusted for stiffness and ride height, springs twice as stiff as those in a normal Viper, and a beefier front stabilizer bar. Forged "Sidewinder" alloy wheels save 30 pounds of unsprung weight, and new two-piece StopTech brake rotors save a further 30. Michelin Pilot Sport Cup tires-basically barely legal race rubber-are standard.

The standard ACR is 40 pounds lighter than the regular Viper coupe. An optional "Hard Core" pack saves an extra 40 pounds through the removal of the audio system, underhood silencer pad, trunk carpet, and tire inflator. The radio is replaced by a lightweight cover that can be configured to mount the lap timer that comes with the package. Hard-core.

Body Style - Coupe
Assembly Plant - Conner Avenue (Detriot, MI)
EPA Vehicle Class - Two-seater

Type and Description - 10-cylinder, 90-degree V-type, liquid-cooled
Displacement- 8.4 liter (510 cu. in.)
Bore x Stroke - 4.055 x 3.96 (103 x 100.6)
Valve System - OHV, Variable Valve Timing, 20 valves, roller-type hydraulic lifters
Fuel Injection - Sequential, multi-port, electronic
Construction - Aluminum alloy block with cast-iron liners, aluminum alloy heads
Compression Ratio - 10.2:1
Power (SAE net) - 600 bhp (450KW) @ 6100 rpm (71 bhp/L)
Torque (SAE net) - 560 lb.-ft. (760 N•m @ 5000 rpm)
Max. Engine Speed - 6,250 rpm
Fuel Requirement - Unleaded premium—91 Octane (R+M)/2
Oil Capacity (with filters) - 10 qt. (9.5L)
Coolant Capacity - 16 qt. (15L)
Emission Controls - Four three-way catalytic converters, heated oxygen sensors, engine internal features(a)
EPA Fuel Economy (city/highway) - N/A (a)Meets Tier 2 standards in all 50 states.

Electrical System

Alternator - 180-amp high-speed
Battery - Leak-resistant, maintenance-free, 600 CCA
Radio - AM/FM/CD radio with MP3 disc play capability, with 310-watt RMS audio amplifier and seven speakers

Description - Synchronized in all gears, electronic 1-4 skip-shift and reverse lockout mechanisms Gear Ratios
1st__2.66
2nd__1.82
3rd__1.30
4th__1.00
5th__0.74
6th__0.50

Axle Ratio - 3.07

Overall Top Gear - 1.5

Description - Frame-mounted hypoid bevel gear with GKN ViscoLok speed-sensing limited-slip differential

Seating Capacity - 2
Head Room - 36.5 (926)
Leg Room - 42.4 (1077)
Shoulder Room - 54.1 (1375)
Seat Travel - 7.6 (192)
Recliner Range - 45°
SAE Interior Volume - NA

Longitudinal front engine, rear-wheel drive Construction Backbone tubular space frame with separate cowl structure. SMC and RIM body panels, aluminum sills, RIM front and rear fascias with composite impact beams

Front - Carbon fiber ‘fanged’ splitter with rub strips; splitter extension; carbon dive planes
Rear - Carbon fiber ACR wing with 7-position adjustable stanchions
Downforce @ 150 mph (high down force set-up) -1000 lbs.

Type - Four-wheel independent with high-performance aluminum control arms and knuckles, and KW Suspensions 2-way adjustable competition coil-over shock absorbers
Front - Cast-aluminum unequal-length upper and lower “A” arms, high rate coil springs, gas charged 2-way adjustable monotube shocks absorbers, high rate stabilizer bar
Rear - Cast-aluminum unequal-length upper and lower “A” arms, toe-control links, high rate coil springs, gas charged 2-way adjustable monotube shock absorbers, stabilizer bar

Type - Power-assisted rack and pinion
Overall Ration - 16.7:1
Turning Diameter (curb-to-curb) - 40.5 ft. (12.34 m)
Steering Turns (lock-to-lock) - 2.4

Size and Type - P295/30 ZR18—front, P345/30 ZR19—rear
Manufacturer and Model - Michelin® Pilot® Sport Cup with low-pressure sensors in valve stems

Type and Material - Lightweight forged aluminum ”Sidewinder”
Size - 18” x 10.0”—front, 19” x 13”—rear

Size and Type - P295/30 ZR18—front, P345/30 ZR19—rear
Manufacturer and Model - Michelin® Pilot® Sport Cup with low-pressure sensors in valve stems