This E60 M5 has Dinan’s stroker kit, and she now makes over 600 horsepower and sounds amazing.

In The Smoking Tire’s latest “One Take” video, Matt Farah takes on not only Angeles Crest Highway, which is a highly technical section of road, but also the Dinan-tuned E34 M5.

Dinan Engineering adds power and improved handling to the 2011 BMW 1M Coupe, and let’s not forget irony. Irony? Yes, because the S3-R, an extensively tuned version of the Bavarian pocket rocket, doesn’t come across as a modified car — it’s not an unreliable, one-dimensional creation.

Future presidents take their first steps down the path of leadership as broke law students. Successful comedians begin their careers making their friends laugh. Steve Dinan laid the foundation for his tuning empire in his home garage in 1979. Now look at him. His eponymous company has won two Rolex 24 at Daytona championships and three Rolex Sports Car Series top trophies. Dinan Engineering now operates out of a 33,000-square-foot facility in Morgan Hill, California.

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 […] More »