The 1.6-litre turbocharged M5M and M5MA engines in the Renault Clio RS Mk4 are fantastic foundations for tuning, but extracting extreme horsepower levels or fitting larger hybrid turbochargers requires a heavily reinforced internal architecture. High-boost applications generate immense cylinder pressures that can quickly expose the limits of factory bottom-end components. We are actively curating a premium selection of Upgraded Engine Parts designed with advanced race-spec materials. By installing forged pistons, forged connecting rods, and race-spec engine bearings, you will drastically reduce internal friction and provide the ultimate bulletproof reliability needed for high-output, big-turbo Clio RS builds.