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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 readying Spartanburg expansion for X7 production

Prior to the debut of the original X5 in 1999, the idea of a BMW crossover might have seemed like heresy. But here we are, fifteen years removed from the Frank Stephenson-penned design, and the Bavarian automaker has expanded its crossover lineup to include the X1, X3, X4 and X6, and it's showing no sign of slowing down.
We recently reported that BMW is planning on slotting an X2 in at the bottom of the range between the X1 and X3, but now it's being widely reported that it's got an even larger one to put in at the top of its utility line. That, of course, would be the X7, a long-rumored three-row model that would give BMW a large family hauler to challenge the Mercedes-Benz GL.
According to The Wall Street Journal, BMW is expanding its assembly plant in Spartanburg, South Carolina, to accommodate production of the X7 alongside the X3, X4 and X5 that it already builds there for local consumption.

BMW considering building 3 Series in North America

There might be even more BMWs coming from North America soon. The company recently announced plans to build a flagship crossover called the X7 at its Spartanburg, SC, factory. Now, rumors are emerging that the Bavarians might be thinking about building a second North American factory that could build its quick-selling 3 Series.
According to Bloomberg, the German luxury giant is considering several possible locations for a North American factory, including two in Mexico, that may build the 3. "We will decide this in the next months. On the North American continent, there's still potential," said BMW production boss, Harald Krueger, in an interview meant for company staff obtained by Bloomberg.
If BMW decides to open a plant in Mexico, it would be following its rival Audi, which already announced construction of a factory there. Mercedes-Benz has been rumored to be working on a deal with Nissan to build its cars South of the Border as well. Rumors of Bimmer considering Mexican production have also cropped up in the past, so it wouldn't come as a total surprise to hear it made official.