Only seven days since the Z4 Coupe Concept was revealed at the Frankfurt Motor Show and already we see these spy shots as evidence BMW is serious about production. The Z4 Coupe will give direct competition to the SLK AMG and the new Porsche Cayman S.  The new roof will add some extra weight but BMW will be using lightweight materials to compensate.  To be called the Z4 CS (Coupe Sport) it will receive six cylinder engines including the upcoming bi-turbo six cylinder engine and possibly a diesel engine in the future - no four cylinders.  The M version will have the E46 M3 CSL engine tuned up to 410-420 hp and 4 tail pipes of course. M-styling will be distinctive.  There is speculation of a CSL version with the M5/M6 V10 engine and even more usage of lightweight materials but highly unlikely.  The three dimensional spoked wheels exclusively developed for the Z4 Coupe Concept will go into production in size 19x8.  The wheels seen in these photos will be for the M version.  The production version will be shown in January at Detroit Motor Show along with the face lifted Z4 Roadster and M Roadster.  To be built in the USA it goes on sale summer 2006.

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