O'Reilly Automotive (ORLY 0.57%) and Snap-on (SNA -0.81%) have far outpaced the broader market over the last few decades despite their rather ordinary-sounding operations. The companies have delivered total returns of 8,790% and 1,790%, respectively, since 2000 -- far superior to the 469% total return of the S&P 500 index. Vehicle repair retailer O'Reilly Automotive has delivered 31 consecutive years of sales and earnings growth. Despite this extended run, the company's growth story might still be in its mi ...