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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.

Automotive April Fools' joke roundup [w/videos]

Happy April, everyone. And we all know what this first day of the month means: April Fools' Day. Today is a national holiday for pranksters with the Internet acting as a serious enabler, and it's always fun to see what kind of vivid imaginations exist out there in the automotive world. The abundance of fake news gets a little old as the day rolls on, but we did manage to get in a few chuckles thanks to a handful of major automakers and automotive news outlets that got into the pranking spirit this year
Some of our favorites this year includes Subaru showing what happens when you combine a bunch of rumors, a Corvette some may have already thought was a joke or Honda providing some in-car innovation circa the late 1980s. Honestly, we're still waiting for official confirmation from Mitsubishi that the recently introduced 2014 Mirage is an elaborate April Fools' joke using a failed design intended for the 1995 Geo Metro. We dug up as much "official" OEM foolishness we could find, as well as some of our other favorites, and posted them all below.

BMW reveals full details on M235i Racing

We were suitably excited when BMW first announced the imminent arrival of the M235i Racing. After all, what's not to like about a factory-prepared racecar with 333 horsepower you can pick up for just eighty grand? Now BMW has released the full details on the latest addition to its racing portfolio, where it joins the M3 DTM, M3 GT4, Z4 GTE/GT3 and 320 TC in a growing family of competition machinery prepared by BMW Motorsport.
Based on the new 2 Series coupe, the M235i Racing is the first M Performance model for the track, and boasts the line's most powerful engine: the 3.0-liter twin-turbo straight six has been optimized to 333 horsepower and 332 pound-feet of torque. A mechanical limited-slip differential helps transfer the power to the track surface, along with race-tuned ABS, DSC and traction control.
Four-pot calipers up front and two-pot calipers in the rear shave off speed for the corner and are packed inside the 18-inch alloys, with KW dampers and H&R suspension components. Inside there's a six-point racing harness and Recaro bucket surrounded by an FIA-certified roll cage, and customers can even have an extra seat installed to take passengers for ride-alongs. All of which can be yours for €59,500.00 - equivalent to $82k at today's rates, before taxes.