A new batch of spy photos has emerged showing the BMW 4-series Coupé in M Sport specification. They follow recent images of a completely undisguised 435i model during a photo shoot.

The M Sport trim will sit at the top of the 4-series range until the M4 arrives. The four specifications offered on the 3-series saloon (SE, Sport, Modern and Luxury) are expected to feature on the 4-series aswell.

On the saloon, M Sport brings a 10mm drop in suspension on firmer springs and dampers. Furthermore, a more aggressive aesthetic is achieved through a unique bodykit and wheel designs. Estoril Blue, a famous BMW colour and the one seen on this 4-series, is also exclusively for M-Sport cars. These changes will also distinguish the flagship 4-series from lesser models.

Previewed as a concept at the Detroit motor show, the 4-series will go on sale later this year, replacing the 3-series Coupé.

It’s clear from these images that some of the show car’s bolder styling details will not make it into production. The treatment of the lower rear bumper is much more conventional, without the concept’s full-width mesh insert and integrated tailpipes.

The concept’s razor sharp crease lines along the bodyside are clearly evident, although the door handle has moved above the strong line that runs from the front wing to the rear three-quarter panel.

The 4-series range will be launched with the Coupé, followed by a convertible in 2014. Later that year the much-discussed M4 will finally appear, with a cabrio version in 2015.

BMW will add a four-door 4-series GranCoupé, with the distinct possibility of an M4 GranCoupé to complete the line-up.