Piston rings are engine components that seal the combustion chamber, transfer heat from the pistons to the cylinder walls, and help regulate oil consumption. To promote engine power and performance, the piston rings and the cylinder wall must form a proper seal. Otherwise, excessive “blow-by” can enter the crankcase. The results can range from power loss to engine damage.
As Performance and Hotrod Business magazine explains, Flex-Hone® tools from Brush Research Manufacturing (BRM) help promote piston ring performance. In an article called “Rings True”, automotive writer Ed Sullivan describes how BRM’s flexible hones “allow for the fine-tuning of cylinder bores”, even in engine blocks made of harder metals that can make piston ring break-in challenging.








