KTM's X-Bow doesn't really need any help to be extreme. It is born that way. But MTM wasn't satisfied, so they took their tuning ways to the car's engine and brakes to make it even more of a trackday star.

The standard X-Bow only sports a 240hp (179kW) four-banger but it's strapped to a lightweight chassis that lets it spint to 60mph in under 4 seconds. The MTM X-Bow ought to knock even more time off that figure with its 318hp (237kW) and 310lb-ft of torque. The extra power comes by way of a special conversion kit the details of which MTM hasn't yet released.

Adding to the MTM X-Bow's performance ability is a set of four-piston Brembo calipers, 305mm rotors and 18in alloy wheels. Nokian Hakkapelliita-4 tires in 245/40 provide the sticky. Top speed rises just a tick to 156mph (251km/h) - plenty fast in an open-cockpit car unless you've got GP-driver neck muscles.

For those lucky Europeans with an X-Bow and money to burn, the MTM kit will add €7,310 ($9,670) to the price of the car, or €64,263 ($85,000) including X-Bow, tax and installation.