CarBahn gives the BMW M4 Competition xDrive an aftermarket makeover that builds on an already-impressive model.

The BMW 4-Series competes with sedans and coupes such as the Audi A5, the Mercedes Benz C-Class and the Lexus IS. Prices start at just over $43,000. Starting at around $65,000, the top-of-the-line M4 ...

While the Alpina B4 S isn’t as razor-sharp as a BMW M4, it’s more luxurious, more exclusive and feels like a better buy as a daily driver. The ride is comfortable without sacrificing the 4 ...

The BMW 4-Series competes with sedans and coupes such as the Audi A5, the Mercedes Benz C-Class and the Lexus IS. The top-of-the-line M4 offers blistering performance and razor-sharp handling but in a ...