The Hexagonal Head bolt Spacer provides a controlled and precise reduction in the Engine's compression ratio during braking, resulting in increased Engine Braking force. By increasing the distance between the cylinder head and the engine block, the effective compression volume of the combustion chamber is reduced.Attributes:• Resistant to deformation• Manufactured to precise specifications and are built for durability and reliabilityApplications:The Hexagonal Head bolt Spacer ensures a tight and secure fit within the engine's combustion chamber.