Dorman Products (NASDAQ: DORM) has built a name for itself by supplying high-quality automotive parts to a hungry aftermarket. Dorman’s expertise and innovation has allowed it to make original equipment manufacturer parts efficiently, and buyers enjoy the benefit of lower costs than what they’d pay from traditional OEM sources. Coming into Wednesday’s fourth-quarter financial report, Dorman investors had high hopes for continuing growth from the auto-parts supplier, and Dorman was able to deliver on that front with strong gains in revenue and earnings.