Dismountable Components in Combustion Chamber

In Simple Terms

F1 engines have several small parts that stick into the combustion chamber (where fuel burns) and can be swapped out. The FIA has a strict list of approved parts for this—things like fuel injectors, spark plugs, and valves. Teams can only use official FIA-approved versions of these components to keep the competition fair.

• Only FIA-approved fuel injectors, spark plugs, and poppet valves can be used in the combustion chamber
• In-cylinder pressure sensors are allowed for replacement but must not exceed 7mm in diameter
• Spark plug coaxial components must also be FIA-approved
• These are 'dismountable' parts, meaning they can be removed and replaced between races