Learn more about whether Allison Transmission Holdings, Inc. or Cummins Inc. is a better investment based on AAII's A+ Investor grades, which compare both companies' key financial metrics.

Parker-Hannifin on Thursday posted a quarterly profit that surpassed estimates, driven by higher demand for its aircraft parts and components, sending its shares up 6% in morning trade.

This was the stock's second consecutive day of gains.

SAF-Holland has rebranded its remanufactured parts products as Haldex Reman. The new aftermarket brand family offers quality ...

Catalytic converters are an important part of your car's functioning exhaust system. Here's how they work and why their parts are so valuable.