A large amount of heat is produced in the IC engine during the combustion process, which directly affects the performance, fuel efficiency, and life of the engine. Extended surfaces are extensively uised in many engineering applications as they are simple to design, consume less space, weigh less. Implementation of high emissivity nanoparticles increases the heat transfer by increasing the surface area of the component. In this research, a plasma coating technique was used to provide a coating of silicon carbide (SiC) nanoparticles on 4-stroke IC engine fins. Furthermore, a Finite Element model identical to the test rig was generated and a numerical simulation was carried out using the FEA technique to investigate the heat dissipation, total heat flux and directional heat flux under applied temperature conditions. The emissivity and heat transfer results obtained from the test rig showed improvement in emissivity and enhancement in heat transfer through the fins. © 2022 Informa UK Limited, trading as Taylor & Francis Group.