The grades of 4 Auto Components stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Tenneco Inc. (TEN) boosts its rating from a C to a B this week. Tenneco Inc. designs, manufactures, and markets emission control and ride control products and systems for the automotive original equipment market and the aftermarket. The company also gets A’s in operating margin growth, earnings growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of TEN stock.

Dana Incorporated’s (DAN) ratings are looking better this week, moving up to a B from last week’s C. Dana Incorporated is a supplier of axle, driveshaft, structural, sealing and thermal management products for global vehicle manufacturers. The company also gets A’s in earnings momentum and return on equity. For more information, get Portfolio Grader’s complete analysis of DAN stock.

Modine Manufacturing Company (MOD) earns a B this week, jumping up from last week’s grade of C. Modine Manufacturing Company specializes in thermal management systems and components, bringing heating and cooling technology and solutions to diversified global markets. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of MOD stock.

China Automotive Systems, Inc. (CAAS) gets a higher grade this week, advancing from a C last week to a B. China Automotive Systems, Inc. designs, markets, and sells custom-designed stained glass and leaded glass artifacts. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of CAAS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.