One of the top performing stocks in my Emerging Growth service is Peerless Manufacturing (PMFG). I added it in the April issue of Emerging Growth and it's already up 40% for us in less than 40 days of trading.

Here's a company description from Hoovers:

Peerless is without peer when it comes to putting products in pipes for purposes of removing contaminants. The company's separation filtration systems are used to remove solid and liquid contaminants from natural gas and to remove saltwater aerosols from the air intakes of marine gas turbine and diesel engines. Customers include natural gas producers and shipbuilders. Products of the company's other business segment, environmental systems, include selective catalytic reduction (SCR) systems, which are used to convert nitrogen oxide produced by the burning of fossil fuels into nitrogen and water vapor. SCR systems are sold to power producers, construction companies, and refineries.