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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.

2014 BMW 328d ready to burn oil in just four cylinders

Despite showing off the new 328d sedan in New Jersey yesterday, BMW though it only fair to bring the first four-cylinder diesel it will ever sell in the US to the New York Auto Show today as well. Unfortunately, the company remains vague about pertinent details like fuel economy and price, but we did hear again that the oil-burner will be capable of getting 45 miles per gallon on the highway. BMW's Oliver Ganser told AutoblogGreen, "We do not want to give out" the city or combined mpg ratings quite yet, but The New York Times got someone to estimate a fuel economy of mid-30s in the city.
The two-liter TwinPower turbocharged and direct injected engine and eight-speed automatic transmission (sorry, no manual will be available) put out 180 horsepower and 280 pound-feet of torque and should get the 328d up to 60 miles per hour in just over seven seconds. As we noted earlier, the 328d will be available with every option and trim level - like all-wheel drive - that other 3 Series models have in the US (transmission excepted) and should start at under $40,000 when it goes on sale this fall.
Officially, the 328b will be able to accept biodiesel blends up to B5 (or, just maybe B7), which is standard diesel with five (seven) percent biofuel. Read more about that and other aspects of the 328d here.

BMW offers M Performance Power Kit for 2012 335i sedan

BMW has let loose a new M Performance Power Kit for its F30-generation 335i and 335i xDrive sedans. Starting at $1,100 for the kit - installation is extra - your car will be fitted with a new ECU and air intake on the functional side and an M Performance engine cover and rocker panel stickers on the decorative side. The Power Kit raises the 3.0-liter inline six-cylinder's horsepower rating from 300 to 320, and on automatic models, torque gets a boost from 300 pound-feet to 332 lb-ft - manual transmission models get a smaller bump to 317 lb-ft.
According to the Bavarian automaker, you'll be able to hear the change in the overrun exhaust note, and 0-60 mile-per-hour times drop by 0.2 seconds. The package is available now at all BMW Centers in the US, and if you get it installed when you purchase the car new, it will get the same four-year, 50,000-mile warranty as the vehicle. Have it done after the fact and the kit will be warranted for two years and unlimited miles. There's a press release below with some more details.