Yes it was the fastest thing around for quite a while 177mph, the engine was Vauxhall however all the modifications to engine, gearbox suspension etc were Lotus, it was the 3.0 litre lump taken out to 3.6 with 2 turbos added, strengthened block, uprated crank and pistons, this was mated to a gearbox from the Corvette, very capable car in its time.