CarParts.com (NASDAQ:PRTS – Get Free Report) and Holley (NYSE:HLLY – Get Free Report) are both small-cap auto/tires/trucks companies, but which is the superior investment? Get CarParts.com alerts:Gross Revenue Price/Sales Ratio Net Income Earnings Per Share Price/Earnings Ratio CarParts.com $588.85 million 0.06 -$40.60 million ($0.96) -0.53 Holley $602.22 million 0.79 -$23.24 million ($0.22) -17.93Insider & Institutional OwnershipHolley has higher revenue and earnings than CarParts.com. Holley is trading at a lower price-to-earnings ratio than CarParts.com, indicating that it is currently the more affordable of the two stocks. Analyst RecommendationsThis is a breakdown of current ratings and price targets for CarParts.com and Holley, as reported by MarketBeat. The company sells its products under the Holley, Holley EFI, MSD, Simpson, Powerteq, Accel, and Flowmaster through DTC, E-tailer, warehouse distributor, traditional retailer, and jobber/ installer channels.