Autoblog recently got their hands on a 2013 Dinan S3 BMW 550i. While a stock BMW 550i puts out 400 horsepower and 450 pound-feet of torque, Dinan uses bigger turbos, air-to-water intercoolers, a cold air intake, free flow exhaust and exclusive engine management software to get it up to 542 horsepower and 587 pound-feet of torque. Suspension tweaks plus forged 20-inch HRE Performance wheels round out the package and add $38,773 to the 550i’s $62,625 base price? Worth it?
