What is it?
A track-focused version of the Dodge SRT-10 – still known as the Viper in the USA. Sadly the fire-breathing Yank is no longer officially sold in the UK, but now American punters get a larger 8.4-litre V10 engine with 600bhp, a beefed-up transmission and a more progressive GKN limited-slip diff.
They also get a chance to buy this: the new ACR version. The acronym decrypts as American Cup Racer, adding forged wheels with super-sticky Michelin Pilot Sport Cup tyres, dampers that can be adjusted for ride height, compression and rebound, two-piece brake discs and an aero kit that delivers 450kg of downforce at 150 mph.
Buyers can even opt to lose the boot carpet, under-bonnet silencing mat, tyre repair kit and stereo for no extra cost, gaining a lap-timing unit with USB download capability instead. The end result is a 1517kg street-legal racer.
What’s it like?
In a word, mega. The ACR looks set to become America’s favourite trackday toy thanks to insane amounts of mechanical and aero grip. The standard Viper is already faster around the track than a Corvette Z06 and the ACR’s the gooey Michelin rubber, trick dampers, and most importantly, the extreme rear wing and two-piece front splitter make for a substantial improvement.