14mm F4R Core Plug - Renault Clio RS & Megane RS

The hidden danger of worn 14mm core plugs on F4R engines

On a high-performance engine like the F4R, no detail is too small. The 14mm diameter core plug is frequently overlooked during major overhauls. However, a porous or loose plug can cause a sudden loss of pressure or localized coolant leaks that remain invisible until catastrophic damage occurs. By failing to replace this part during your engine personalization or rebuild, you risk costly downtime and potential engine seizure.

High-Performance durability for Track and Rally

Thermal stress on a Clio 2 RS or Megane 3 RS far exceeds standard driving conditions. Our 14mm plugs are manufactured to provide superior resistance to expansion and contraction. This ensures reliable engine sealing, whether you are on a rally stage or pushing limits during a track day.

Renault Sport Engine Compatibility:

• Renault Clio 2 RS (including Ragnotti and Gr N models)
• Renault Clio 3 RS (Phase 1, 2 and Cup / R3 versions)
• Renault Megane 2 RS (225, 230, and R26.R)
• Renault Megane 3 RS (250, 265, 275, and Trophy-R)

Why trust Optimiz Access for your F4R parts?

As specialists in sports vehicle maintenance since 2010, Optimiz Access only supplies components that have been tested and approved for high-stress environments. We understand the high standards of Renault Sport owners. Ordering from us means you benefit from fast worldwide shipping and the expertise of a team based in Hauts-de-France, near Lille and Valenciennes.

Professional Installation Services

Removing and installing a core plug requires precision tools and experience. Our workshop, located near Cambrai and Arras, is available to perform these delicate operations. We also export our performance parts globally to support automotive projects wherever you are.

Don't forget to check the complementary products at the bottom of this page to complete your engine assembly.