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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.

BMW planning to stretch i3 into i5 family hauler?

If you're sweet on the new BMW i3 but wish it had more space to carry people and stuff, we've got good news for you. According to Autocar, BMW is planning on stretching the platform that underpins the i3 to create a new model, expected to be called i5.
The stretch job would add an extra four inches of legroom in the back and another six inches of rear overhang to the benefit of cargo space. The result would create a vehicle longer than the current Mini Countryman - although the next Countryman is likely to be even larger. As Autocar points out, the process of extending the i3's composte passenger cell likely wouldn't be as difficult or cost-intensive as lengthening a conventional metal chassis, although the rear doors would need to be re-engineered.
Whether the resulting vehicle would more closely resemble a hatchback, wagon, minivan or something in between remains to be seen, however BMW is said to have already registered the nameplates i1 through i8, signalling that the possibility is at least there to add more members to its new EV family.

BMW 3 Series wagon configurator up, priced from $41,450

If you're still smarting from the shock of the BMW 3 Series Gran Turismo, we have good news for you. BMW has just fired up the configurator for the 2014 3 Series wagon. Prices start at $41,450, excluding an $895 destination and handling fee. The price tag will buy you a 328i xDrive Sports Wagon with a 2.0-liter inline four-cylinder engine boasting 241 horsepower paired with an eight-speed automatic transmission as standard equipment. The automaker's xDrive intelligent all-wheel drive is also standard, as is a fuel-saving auto start/stop function and 17-inch alloy wheels wrapped in all-season run flat rubber.
Buyers can step up to Sport Line trim for $2,600, and doing so graces the 3 Wagon with 18-inch wheels, high-gloss black accents outdoors as well as a sport leather steering wheel, high-gloss or aluminum interior trim and a black signature key fob. Luxury Line trim will set you back $2,300 abd features chrome trim accents outdoors and wood trim inside along with other goodies. Buyers can also opt for Modern Line trim at $2,300, complete with a turbine-design 18-inch alloy wheel, matte chrome trim bits outdoors and a range of interior trim options.
Our favorite of the bunch? That would be M Sport trim. While the tweaks are largely aesthetic, we dig the notion of 8-way power adjustable sport seats indoors and exclusive M Estoril Blue paint outside. Expect to pay $3,950 for the pleasure. Head over to the BMW site to build your own.