<P> The Slingshot is manufactured by Polaris Industries, which claims "It's a three - wheeled motorcycle!" It has a tilt - adjustable steering wheel, side - by - side bucket seats, and does not lean . Three - point seat belts are fitted, however it has no airbags or crumple zone, and driver and passenger must wear motorcycle helmets in certain jurisdictions . It has no roof, doors, or side windows . A small windshield is an optional extra on the base model, and fitted as standard on the SL model . The steering wheel, gear stick, and brake, clutch, and throttle pedals have a conventional automobile layout . </P> <P> Depending on which state the Slingshot is registered in, it will either be registered as a motorcycle, or as an auto - cycle . Hawaii is the only state still legislating on vehicle classification . </P> <P> The Slingshot weighs 1,743 pounds (791 kg) and is powered by a 2.4 liter inline four engine derived from the GM Ecotec . This engine was formerly used by GM in the Pontiac Solstice and Saturn Sky sports cars . </P> <P> The 2015 Polaris Slingshot has a 2384 cc displacement, with a five - speed manual transmission . The standard Slingshot has two 17" front wheels and a singular 18" wheel in the rear of the vehicle, while the Slingshot SL and SL LE Edition have two 18" forged aluminum front wheels with a 20" rear wheel . All models have a double - wishbone front suspension with a sway bar to control the front end . </P>

What type of engine is in a polaris slingshot