The 2015 BMW M4 saw lots of love at SEMA this year, and for good reason. The German special has all the right roots to make it quite the tuner car for those daring to mess with something so good out of the box, like a twin-turbocharged, 3.0-liter, inline-six motor putting out a healthy 425 horsepower through a six-speed manual gearbox (don't forget the optional seven-speed dual-clutch automatic for those afraid of more than two pedals). Then there's the suspension, which is geared with obvious intention toward track usage over previous models, with 'play-free' ball joints and elastomeric bearings, a CFRP strut-tower brace, and a rear axle that's bolted directly to the rear subframe. The result is a car that simply begs for apexes.[...]