The 1.8-litre turbocharged M5P series engine in the Megane RS Mk4 is a technological marvel shared with the Alpine A110, 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 (forged pistons, forged connecting rods, engine bearings etc.) designed with advanced race-spec materials. Upgrading your internals with these forged components will drastically reduce internal friction, improve oil retention, and provide the ultimate bulletproof reliability needed for high-output, big-turbo Mk4 builds.