Pale Steel Blue Paper — 2 museum-grade prints in this palette. The Shelby Cobra 427 is the fastest AC Cobra variant and one of the most replicated classic cars in automotive history, with hundreds of kit-car and replica builders active worldwide. The original Cobra 427 set a top speed of 165 mph. The Hennessey Venom GT set a one-way top speed of 435. 31 km/h (270.