Don't risk a critical oil leak or a loss of pressure on your Renault Sport engine. This 50mm core plug (expansion plug) is a vital safety component for sealing your F4R engine block. Designed to withstand the extreme constraints of both track and road, it ensures a hermetic seal on the clutch side or timing side. Fully compatible with the Clio 2 RS, Clio 3 RS, and Megane RS range.
Ignoring the condition of your expansion plugs during an engine rebuild or major maintenance is a costly gamble. Over time, heat cycles and vibrations cause original plugs to lose their sealing integrity. A failure here leads to a massive oil leak, which can result in immediate engine seizure or a fire hazard under the hood. Do not let a low-cost component sideline your performance vehicle.
This 50mm diameter plug has been specifically selected by Optimiz Access for Renault Sport F4R blocks. Whether you are building a rally car or maintaining your daily driver, this part meets the rigorous demands of both OEM and competition standards.
Since 2010, Optimiz Access has supported enthusiasts in vehicle personalization and performance. We know that quality parts are the foundation of reliability. This core plug guarantees optimal resistance to internal pressure, even during intense temperature spikes on track days.
Based in Hauts-de-France (near Lille, Cambrai, and Arras), our technicians can handle the installation of your parts and complete maintenance for your sports car in our workshop. We also ship worldwide with fast delivery to ensure your project never grinds to a halt.
Note: To complete your build, please check the complementary products at the bottom of this page, including our high-performance cooling solutions.
Data sheet
Specific References
Don't risk a critical oil leak or a loss of pressure on your Renault Sport engine. This 50mm core plug (expansion plug) is a vital safety component for sealing your F4R engine block. Designed to withstand the extreme constraints of both track and road, it ensures a hermetic seal on the clutch side or timing side. Fully compatible with the Clio 2 RS, Clio 3 RS, and Megane RS range.
