A replacement spark plug thread insert with M14x1.25 size, specifically designed for Citroen models such as the 2CV, DS, HY, 11CV, and 15CV. This insert offers a reliable solution for repairing damaged threads in the cylinder head. It is essential for the maintenance of classic Citroen vehicles where preserving the original engine performance is crucial. The product is made from high-quality material to ensure durability and a perfect fit for the specific series of models.