A strong stock as of late has been Dorman Products (DORM) . Shares have been marching higher, with the stock up 16.4% over the past month. The stock hit a new 52-week high of $166.89 in the previous session. Dorman Products has gained 28.4% since the start of the year compared to the -5.9% move for the Zacks Auto-Tires-Trucks sector and the -2% return for the Zacks Automotive - Replacement Parts industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, having be ...