SAVANINI modified the front section, middle section and rear section steel throat M3 E92 series

 The original rubber brake tubing will expand, and when the pressure generated by the brake oil extrusion will absorb some pressure, resulting in pressure loss when the brake oil is transmitted to the caliper piston, the brake oil will produce high heat, and the heat-resistant rubber brake tubing will be damaged because of high heat. Brake throats are made of teflon...