BMW is making a lot of buzz at the Frankfurt Motor Show, and amidst all the plug-in hybrid news, there's plenty more to see because they brought a few more cars to the world premiere.

One of them is the 4-Series Coupe. They introduce a range of bespoke BMW M Performance parts for the coupe model that will become available early next year.

An engine kit will lift the output by 16hp and 20Nm of the 420d, and the 430d's inline six by 27hp and 40Nm, and the 435i's inline six petrol by 34hp and 50Nm.

The list of available performance upgrades also includes a limited-slip differential, sports suspension, bigger brakes with red, yellow or orange-colored brake calipers and a choice of alloy wheels in sizes up to 20-inches.