Autoblog writer Michael Harley took a spin in our RWD 550i S3 to see what the Dinan Difference was all about. Read the full story after the jump.The 200 mph capable 5-Series features a comprehensive blend of components designed and tuned by Dinan, recognized for 34 years as the BMW tuning expert, to enhance every aspect of the vehicle’s performance. The 550i S3 offers the only warranty on the market that matches manufacturer coverage for 4 years/50,000 miles and is available in both rear-wheel drive and all-wheel drive configurations. The 550i S3 offers remarkable performance and the same warranty coverage, resale value and reliability BMW owners expect, all backed by Dinan’s nationwide network of authorized dealers and service centers.

Full Autoblog Review HERE