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Porsche pulled the wraps off of the new 911 RSR endurance race car.

Caption by / Photo by Josh Miller/CNET

However, there's more than meets the eye here. The new RSR breaks from 911 tradition and moves the engine amidships.

Caption by / Photo by Josh Miller/CNET

This may not seem like a lot, but it's a wild departure from the 911's longstanding rear-engine layout.

Caption by / Photo by Josh Miller/CNET

By moving the engine inboard, the RSR gains better weight distribution and room is freed up for a massive rear diffuser.

Caption by / Photo by Josh Miller/CNET

Behind the wheels are aluminum monoblock brakes that are fed cool air by dedicated vents.

Caption by / Photo by Josh Miller/CNET

In addition to the diffuser, a new rear spoiler has been added that is inspired by the 919 LMP1 prototype racer.

Caption by / Photo by Josh Miller/CNET

The 911 RSR's 4.0-liter flat-six engine makes up to 510 horsepower depending on the restrictor required by the racing series.

Caption by / Photo by Josh Miller/CNET

Two examples are being built to compete in endurance racing, including the 24 Hours of Le Mans and the Daytona 24 Hours.

Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
Caption by / Photo by Josh Miller/CNET
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