The Zagato Mostro has been unveiled a day before its public debut at the Concorso d'Eleganza Villa d'Este, which takes place over the weekend on the shores of Lake Como, Italy.

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Only five Mostro coupes will be built to celebrate Maserati's centenary. All of the small build run has already been allocated to long-time Zagato owners and all Mostros will be delivered by December 2015.

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The Mostro features a carbonfibre body, dubbed MonoCell by the company. Underneath this is a structure of steel tubes that forms the passenger area. Attached to this is a subframe for the petrol tank, exhaust, rear suspension and transmission.

Ahead of the driver and passenger is a 4.2-litre Maserati V8 with dry-sump lubrication. Power is transmitted to the rear-mounted six-speed semi-automatic transmission via a rigid transaxle.

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The car rides on 19-inch alloy wheels fitted with 255/40 rubber up front and 295/35 tyres at the rear. The Mostro has front and rear double wishbone suspension.

Given the bespoke nature of the car, no performance or pricing numbers have been provided. In a conversation with Autoblog, Zagato says that "none of [its] atelier cars exceed one million", although it's not clear if they're referring to euros or dollars.