ATLANTA — Vehicle emissions testing and safety inspection company Speedemissions Inc. says it has found a way to further improve per unit economics.

Speedemissions, which has stores in Atlanta, Houston, St. Louis and Salt Lake City, is now selling light bulbs, windshield wipers and other accessories to customers on whose cars they conduct safety inspections. The retail offerings are a means to increase store level revenue and income, the company said.

At the present time, only stores in Houston, St. Louis and Salt Lake City can sell this merchandise as a “convenience” to customers when their car fails the safety inspection because of a burned-out light bulb or defective windshield wipers. In addition to these items, the company has added gas caps, a windshield treatment and a headlight restoration program to its array of products offered. It has under review some other automobile products it hopes to begin selling by year-end.

The company said it believes this is another step in retaining customers and attracting new ones. Now, they don’t have to go to an auto parts store then come back to a Speedemissions store for the re-test, the company says.

“Giving customers options is what we’re trying to do,” said Rich Parlontieri, president/CEO of Speedemissions. “We studied this idea for many months before putting it in place. We feel our customers appreciate the fact we can save them a few minutes when it comes to keeping their car in compliance with state requirements for automobile safety. This also is another way of engaging the customer and maintaining a relationship with them.

“Along with CARbonga (an iPhone app to inform the driver about auto safety through the manufacturers’ recall and technical service bulletins), we’re pushing to create an automotive service and technology business that’s focused on helping to keep a car’s emissions low and its safety benefits high.”