Order books are open for both kits which are built for the 2015 Mustang GT. Prices start at a whisker under S$19,100 for the HPE600 kit. For that price, you get a 2.3-litre supercharger system, new gaskets plus fluids and the necessary ECU tuning. 806Nm of torque at 4,400rpm comes as standard too.
Want more? Get the HPE700 for an additional S$3,700, Hennessey will install a larger 2.9-litre supercharger system with the necessary hardware ( think larger fuel injectors and pump etc. ). Power increases by 282bhp, from a not-exactly-insufficient 435bhp in stock form, while torque is now a mind-boggling 860Nm at 4,400rpm.
So how fast is it? Hennessy says the with the HPE700 kit, the century sprint can be achieved in a scant 3.6 seconds and it will cross the quarter mile mark in 11.2 seconds at 211km/h. For comparison's sake, a Ferrari F50 does the same quarter mile in 11.7 seconds.
If we were in America, we would definitely get the S$9,600 Carbon Aero package also. It gives the car an even wilder look and it includes a front splitter, side sills and a rear lip spoiler.