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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.

Are you a BMW M4 GTS track car in disguise?

BMW is always happy to extract a little bit more gumption out of its M cars, just look at the latest 30th anniversary M5 or even the earlier CSL variants of the M3 for proof. Now, It looks like we might be getting the first glimpse of an even hotter M4, and it's wearing very interesting livery.
Our spies recently shot this M4 that could preview a future GTS version. It's all done up in MotoGP decals, but that might just be a ruse. This car sports a camouflaged lower air dam and rear wing, but those parts don't appear to be from an actual series safety car. The chin spoiler seems larger, and the rear wing is completely different. You can also spot an obvious Recaro logo on the driver's seat in one of the photos. Plus, the BMW emblem is removed at the back.
The disguised changes and odd choice of decals make this prototype incredibly weird. A BMW exec said at the beginning of the year that there were "no plans whatsoever to make a lighter, harder version just yet," of the M3 or M4, despite earlier rumors to the contrary. Check out the gallery to see what you think this is.

2015 BMW 1 Series facelift revealed [w/video]

While we don't get the BMW 1 Series at all in the US anymore, European buyers are getting a refresh of the luxury compact hatchback for the new year. Unlike the German brand's recent work on the 6 Series, the work is actually noticeable and improves things nicely. Up front, BMW keeps the changes subtle. The lower airdam is tweaked with larger air intakes and less chrome than before. The redesign and better sealing around the reshaped, narrower headlights also help optimize airflow and – in our eyes – improve aesthetics. LED running lights are standard now, and full LED units are optional. The more striking changes come at the back, where the 1 Series now wears the Bavarian brand's latest L-shaped taillights. The lights wrap around the sides and cut into the hatch to create a much more visually interesting look. The lower apron gets some small changes as well, and it all works together to create a more cohesive look. The BMW hatchback also gets some engine tweaks to go with its updated style. A new 2.0-liter four-cylinder is offered in 150-, 190- and 224-horsepower tunes. For those who want the best fuel economy, the 116d EfficientDynamics Plus makes 116 hp from a 1.5-liter turbo diesel and features active air flaps and redesigned kidney grille bars for better aero. The top-spec M135i with its 3.0-liter turbocharged inline-six gets a six-hp boost to 326 hp, too. Updates to the eight-speed automatic give it longer gearing and predictive shifting based on the vehicle's navigation system data. All of the new models hit the market in Europe later this year, specifically in late March for the UK. Read below for BMW's full list of tweaks and changes and to see it in motion on video. The BMW 1 Series for 2015 16.01.2015 Nearly two million 1 Series models have been sold since the introduction of the first 1 Series generation ten years ago. This latest incarnation builds on the winning formula of these three- and five-door predecessors with new power units from the latest BMW engine family, additional EfficientDynamics technologies fitted as standard, and careful enhancements to the exterior and interior design. The level of standard equipment is now even higher, new options have been added and with new mobility services from BMW ConnectedDrive, there are even more ways to increase the functionality and personalisation of the new 1 Series.