I would have to say that a true "Motorsports" business would have the knowledge and know-how to know what to buy for the customer, what the certain parts do and have the instrumentation to install these parts. Many "Motorsports" businesses are just selling parts and labor on thier spare time, which IMO is not a bad thing, as long as they can back what they sell and have knowledge of what they are selling... Just my 2c.
