Now that they have taken over the whole Viper project, the performance junkies at Chrysler's Street and Racing Technology division got together with some of their racing buddies to create their version of the ultimate track-day special - the SRT Viper Time Attack.
The TA, as it has inevitably become known, will make its public debut at the New York auto show on 27 March.
Unusually for an American muscle-car, SRT have left the 8.4-litre V10 alone. Maybe they figure 472kW and 815Nm - which they claim is the most torque of any naturally aspirated sports-car engine in the world - are, to quote Sir Henry Royce, adequate.
What they have done is to update the running gear, using mostly off-the-shelf components from SRT; the suspension features two-mode Bilstein Damptronic shock absorbers with firmer levels of damping and a smaller spread between modes than on the Viper GTS models, as well as race-spec anti-roll bars.