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2013 Dinan S3 BMW 550i

Steve Dinan has been enhancing BMW models since 1979. But don't throw his company into the ring with the dozen or so other tuners who tweak, tinker and piggyback upgrades on the famed German marque. Dinan is a tuner, but it's also an engineering firm that writes its own software, builds its own parts and then backs everything it does with a factory-grade warranty. That sort of fastidiousness comes at a price, but most of its customers - including the powerhouse of BMW Motorsport - rely on Dinan to help them come out on top.
In stock form, BMW's 550i is a formidable four-door with a twin-turbocharged 4.4-liter V8 rated at 400 horsepower and 450 pound-feet of torque. While those figures allow it to run with quick company (0-60 in 5.0 seconds, according to the automaker), Dinan puts the sedan's kettle on full boil with its S3 package. Starting with the engine, the performance engineering firm bolts on larger turbochargers, air-to-water intercoolers, a trick strut tower brace cold air intake, a quad-pipe free flow exhaust and its own engine management software. Pump in some premium fuel, and the result is 542 horsepower and 587 pound-feet of torque. Power is sent through the stock eight-speed automatic to a limited slip rear differential (Dinan will upgrade xDrive all-wheel drive models, too).
The Dinan S3 also features and extensive suspension upgrade that includes new front camber arms and low compliance rear control arms (engineered to reduce understeer and improve turn-in). The stock dampers are retained, but new bump stops are installed along with new springs. Overall, the car rides about a half-inch lower than stock to improve roll rate. To reduce unsprung weight, forged 20-inch HRE Performance wheels are fitted at all four corners (wearing Michelin Pilot Super Sport tires - 275/35ZR20 up front and 295/35ZR20 in the rear). Lastly, the company remaps the factory Electronic Damper Control (EDC) software with its own Dinan Shockware to work in conjunction with the new enhancements.

Hamann M6 Gran Coupe is all flared and shiny

Oh, Hamann. After rolling out the ridiculously pink Mystère at this year's Geneva Motor Show, the tuning company has worked its mirror-finishing magic on the BMW M6 Gran Coupe, debuting this, the aptly named "Mirror" at the Frankfurt Motor Show. It sure is shiny, and a full 40 millimeters wider than the standard M6 GC.
Hamann says that the, um, "tailor-made suit" exterior treatment is made up of a new front bumper spoiler with large air intakes, side skirts, a new rear spoiler, and wing extensions out back. And the end result is... well, let's just call it noticeable. The special BMW rides on unique 21-inch wheels and sits a full 25 millimeters closer to the ground, as well.
As far as we can tell, Hamann hasn't upgraded the M6's 4.4-liter twin-turbo V8 at all, though there's a new sport exhaust system that "depending on the application area, either noisily announce its presence or purr sportily." Sounds like it's as loud as its newfound appearance.

2014 BMW X5 priced from $53,725*

A month after the official curtain was dropped, BMW has seen fit to release pricing information on its new 2014 X5 crossover. The X5 sDrive35i, which is the first rear-wheel-drive version of the X5, will begin at $53,725 (*including $925 for destination and handling) while the traditional all-wheel-drive X5 xDrive35i will begin at $56,025. Both feature BMW's well-regarded 3.0-liter TwinPower Turbo N55 engine with 300 horsepower and 300 pound-feet of torque.
The 2014 BMW X5 xDrive35d (Have these convoluted names confused you yet?) is priced at $57,525 with its 3.0-liter diesel engine (255 hp and 413 lb-ft), and, finally, the TwinPower Turbo V8-powered X5 xDrive50i (445 hp and 480 lb-ft) will start at $69,125. Buyers looking to customize their X5 experience can choose from the Luxury Line, xLine or M Sport packages, plus Ivory White and Mocha Interior Design Packages. Regardless of which engine is chosen, the X5 will come equipped with an eight-speed automatic transmission.
For comparison, the 2013 X5 xDrive35i started at $48,425. That means the price has increased by over $5,000 despite not including standard all-wheel drive or by $7,600 when comparing apples to apples with similar six-cylinder engines and power to all four wheels. The V8 model increased by $4,000 and the diesel, interestingly enough, dropped by $100.