The Hennessey Venom GT Spyder is an open-top variant of Hennessey's 2012 Venom GT. The Spyder was developed after a request for an open-top version from Aerosmith's lead singer Steven Tyler and 5 units were produced during the 2013 model year. It uses a heavily modified Lotus Elise chassis. The engine displacement of the LS9, taken from the the Chevrolet Corvette C6 ZR1, was increased to 7.0L from 6.2L for an 44 extra bhp to compensate for the increase in weight over the original model.