Subaru and Cosworth have been working together again. This special edition Cosworth Impreza STI CS400 has been teased round about the same time as Subaru launched this teaser image of a New York-bound 2011 MY Impreza STI.

The pocket-sized CS400 starts selling in June. A highly limited run of only 75 units are being prepared and performance is said to be thrilling.

Official figures confirm maximum power at 294kW (400mhp/ 395bhp/ 400PS) made at 5,750rpm, quite a far cry from the standard (221kW (300mhp/ 296bhp/ 300PS). The sprint time is even more impressive at 3.7 seconds for the 0 - 62mph dash. Top speed was not mentioned.

Stopping power is provided by a bespoke brake package consisting of six-pot callipers and 355mm discs at the front. They were developed in collaboration with AP Racing, a company that supplies brake and clutch components to some Formula One teams and others.

A number of other technical changes, including suspension and exhaust upgrades were made. The exterior and interior also experienced modifications. Further details will be available closer to the date of sale. For now enjoy these teaser images.