The high-powered lightweight engine in the Hayabusa lends itself to non-motorcycle applications. The Westfield Megabus is an English sports car, based on the Lotus Seven, which uses the Hayabusa engine. Suzuki was the first to put the motorcycle’s engine in a car, with two concept cars in 2001, the Suzuki Hayabusa GSX-R/4 roadster and the Formula Hayabusa, an open-wheel race car “designed for a new Japanese one-make competition series.
Mike Akatiff’s 2004 land speed record attempt TOP 1 Ack Attack streamliner used twin Hayabusa engines in an attempt to exceed 483 km/h (300 mph) at Bonneville Salt Flats. In 2006 and again in 2008 Akatiff’s Ack Attack, ridden by Rocky Robinson, succeeded, first going 552 km/h (342.797 mph) in 2006, only to be surpassed two days later, then returning in 2008 to set another new record of 581 km/h (360.913 mph). That record stood until 24 September 2009, when it was broken by Chris Carr with a speed of 591 km/h (367.382 mph).
Radical Sportscars use the Hayabusa engine in stock form in their SR1 entry-level race car and in a modified up to 1.6L in their SR3 and PR6 cars. They also designed Suzuki Hayabusa a 2.8 L (170 cu in) V8 engine based on the inline-four Hayabusa engine using dual Hayabusa cylinder heads mated to a custom bottom end, known as the Powertec RPA V8 engine to power their SR8 car. The 455 bhp (339 kW) sports car set the record for the fastest production car at Nürburgring.