The production version of the Alfa Romeo 4C Spider has been unveiled at the 2015 North American International Auto Show.

Like its Coupé sibling, the Alfa Romeo 4C Spider is built around an exotic, ultra-lightweight monocoque chassis, comprised entirely of unilateral, “pre-preg”, carbon fibre layers that delivers material performance that is three-times stronger and seven-times lighter than steel.

The Coupé’s glazed engine cover and flowing coupé shape gives way to a more traditional spider form, with pronounced buttresses and a body-coloured engine deck-lid with three functional heat extractors and an aerodynamically tuned spoiler. The rollover structure is housed in a black (or optional carbon fibre) “halo”, creating visual harmony with the carbon fibre windscreen frame, where the attachment points for the removable, stowable cloth roof (or optional carbon fibre hardtop) can also be found.

Other new features to debut on the Alfa Romeo 4C Spider Concept include an all-new, titanium exhaust system, mounted centrally with switchable modes which can be altered depending on the driving environment and driver’s mood.

In addition to the existing colours available on the Alfa Romeo 4C a new Giallo (yellow) paint scheme is also offered.

Powered by the same, all-aluminium, 240hp, 258 lb.-ft., 1750 TBi engine as the Coupé, performance for the U.S. model is on a par with the hardtop model, with a top speed of 160 MPH and a 0-to-60 MPH time estimated at 4.1-seconds.

Alfa Romeo 4C Spider