Mint Condition X3 With M Sport Pkg/cld Wthr Pkg/prem Pkg/4 Whl Dr/nav/ 65k Miles on 2040-cars

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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 R NineT

BMW is taking a page from the Harley-Davidson playbook with its groundbreaking R NineT. A retro cafe racer with an urban hooligan twist, the bike is fully customizable from fork to exhaust. Of course, any motorcycle can be customized, but the fact that BMW has built its newest bike to encourage modification using parts that can be swapped with simple tools is a radical move for a motorcycle maker best known for its plug-and-play touring bikes.
To underscore exactly how radical, BMW has even partnered with custom heavy-hitter Roland Sands Design, which developed the initial concept for the bike and is now manufacturing a full line of parts and accessories for the R NineT, including radial valve covers ($950), retro racing saddles ($400-$420), radial gauge housing ($400) and a radial headlight bezel ($250), among other things, all of which can be swapped with a socket wrench or screwdriver instead of a hacksaw, wire cutters and TIG welder.
Alas, the bike I tested for two weeks was stock, so consider it a blank canvas.

The 570-hp AC Schnitzer ACL2 Concept tries to one-up the M2

AC Schnitzer's new ACL2 concept aims to outdo the BMW M2 at the Geneva Motor Show. To out-muscle the latest M car, the German tuner starts with an M235i and installs the M4's 3.0-liter inline-six. The company also turns up the power to 570 horsepower – a healthy upgrade over 365 hp from the M2's 3.0-liter. The power bump lets the ACL2 reach 62 miles per hour in 3.9 seconds and hit a top speed of 205 miles per hour, AC Schnitzer claims. Those figures make the coupe a few tenths quicker than the M2's 4.2-second to 60 mph sprint, but BMW limits its creation to 155 mph. AC Schnitzer's long list of upgrades makes the impressive performance possible. To get the most out of the engine, the company installs a carbon fiber intake. It also replaces the most of the exhaust, including the downpipe, catalytic converter and tailpipes. Carbon-ceramic brake discs make sure a driver can control so much power, and the company fits a fully adjustable suspension to aid handling. The ACL2's body is too loud for our tastes even through the subdued dark green paint, but the extensive use of carbon fiber parts should keep weight down. AC Schnitzer adds a road-scraping front splitter with canards at each corner. The rear has a similarly aggressive diffuser and huge wing. The wider fenders also add 5.5 inches to the coupe's width, and 20-inch wheels sit underneath them. The ACL2 doesn't get to challenge the M2 on the Autobahn yet because AC Schnitzer says it's just a concept. The coupe exists simply for the company's product development. However, if you want to put all of these bits together, the final cost would be 149,000 euros ($161,500 at current exchange rates), the tuner claims. Related Video: