Top and bottom performing auto parts companies as measured by SmarTrend investment and stock tracking analysis service include a number of companies with significant aftermarket activities. Below are the top five companies in the Auto Parts & Equipment industry as measured by relative performance by SmarTrend. This analysis was compiled based on Monday’s trading activity. Fuel Systems Solutions (NASDAQ:FSYS) ranks first with a gain of 5.78%; Johnson Controls (NYSE:JCI) ranks second with a gain of 2.34%; and American Axle & Manufacturing (NYSE:AXL) ranks third with a gain of 1.89%. Tenneco (NYSE:TEN) follows with a gain of 1.88% and ArvinMeritor (NYSE:ARM) rounds out the top five with a gain of 1.05%. SmarTrend reports that it is bullish on shares of FSYS and alerted subscribers to Buy on July 28, 2010 at $29.26. The stock has risen 16.4% since the alert was issued.