This Honda Civic Integra shift knob adapter is a practical aftermarket manual shifter replacement component specially developed for Honda Fit GK5, multi-generation Civic and Integra manual transmission models, sold as two complete base assemblies with integrated clamping buckles and dust shielding structures. Built around standard M10*1.5 thread gear shift base, this adapter has precise physical measurements of 27mm top diameter, 24mm bottom diameter with corresponding height sizes to achieve tight locking installation on original factory shift lever poles. Equipped with an integrated Plastic dust cover for shift knob, the structure effectively blocks dust, debris and tiny particles from entering the internal shift mechanism, reducing abrasion and dirt accumulation inside the gear shifting assembly during long-term vehicle use. As a universal Car interior shifter accessory, this molded plastic base optimizes the assembly interface for most aftermarket modified shift knobs, solving loose fit and unstable shaking problems after replacing original factory shift knobs. Functioning as a reliable Manual transmission shift adapter, it supports tool-free quick installation following six simple operating steps, which is friendly for daily DIY interior modification for vehicle owners without professional maintenance experience. The high-strength plastic material delivers excellent wear resistance and structural stability under frequent shifting operations, avoiding fracture or deformation under normal driving conditions. Minor dimensional deviations may appear due to manual measurement work, buyers need to confirm the thread specification of their original shift lever before purchase. This cost-effective shifter base adapter improves the assembly firmness of modified shift knobs while keeping the internal shift mechanism clean, upgrading the overall use experience of manual transmission vehicles for Honda Fit, Civic and Integra series models.