Hastings compression rings have almost 100 years of history behind them that includes refinements in engineering and manufacturing processes that have resulted in an in-house foundry and high-tech systems for testing, simulation and manufacturing. Hastings makes both OEM and aftermarket parts. The Hastings Engine Piston Ring Set consists of top compression rings, second compression rings and oil control rings. Top compression rings trap combustion gases and help to increase the combustion pressure and efficiency, as well as assisting the heat transfer process between the piston and cylinder wall. Second compression rings scrape oil and stop it from getting to the combustion chamber; in addition, they provide a second seal for trapping combustion gases and assist in heat transfer. Hastings is the forward-thinking company when it comes to oil rings and originated the multi-piece oil ring, which was followed up with the Flex-Vent expander, by which all other oil rings are judged.