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Vorsteiner BMW M4 GTRS4 shows how to do a widebody at SEMA

Part of the joy of the SEMA Show is that all of the best tuners in the world are competing to show off their wares, and the challenge often pushes the companies into some absolutely insane directions. Case in point: Vorsteiner and its ludicrous GTRS4 wide body kit with the BMW M4.
According to Auto Evolution, the kit reportedly adds 4 inches in the front to fit 10.5-inch-wide wheels and a massive 7-inches more in the rear to snug in 13.5-inch-wide wheels, but spinning around the BMW in these images makes the changes look even more extreme. Beyond just the extra room in the fenders, the lower air intakes are ready to suck in huge volumes of cool air, and there's a front splitter to keep things planted. The front and rear extensions are joined by side sills that grow the farther back they go. Finally, at the rear, the M4 gets a reworked diffuser with mesh inserts.
This is just the type of automotive craziness that makes SEMA interesting. Take a lot at it for yourself in the gallery.

Next BMW X1 caught on flatbed

The X1 had been around for four years before it was added to BMW's US lineup, so it isn't all that surprising that a new version of the company's smallest Sport Activity Vehicle is already in the works. Captured in transit on the back of a flatbed truck, these spy shots give us our first look at the next-gen X1 - codenamed F48 - which is expected to debut around 2015.
While the camouflage does a good job of obscuring most of the styling elements, we definitely see evidence of the X1's new platform. Elements like the loss of the long nose and a noticeably shrunken dash-axle gap (just compare this spy shot picture to this one from our X1 review), are good indicators that the next X1 will move to the new front-wheel-drive platform BMW is using for the new Mini and 1 Series GT. Aside from this, the overall shape is very similar to the current design, but we're sure it will pull many cues from the updated range of BMW products.

BMW M4 vs. Lexus RC F in Head 2 Head sports coupe showdown

It's the showdown everyone's been looking forward to, the East versus West grudge match of the year. We're talking, of course, about the BMW M4 versus the Lexus RC F.
Although BMW uses a twin-turbo straight-six and the Lexus uses a free-breathing V8, the two are pretty closely matched on paper: a luxury coupe with over 400 horsepower channeled to the rear wheels.
The BMW has been doing these cars for longer, and the M4 boasts a higher power-to-weight ratio. But then the RC F has more power - and without forced induction to break up the rev range. So which is the better luxury muscle coupe? Watch the latest episode of Motor Trend Head 2 Head to find out.