You are looking at the Kartboy Shifter Bushings which have been designed to replace the stock 5-speed bushings on 98-2008 models. These bushings will not change the geometry of the shifting mechanism, however, they will help eliminate excessive play in the system to provide a more solid gear change. These are made from black 95A durometer polyurethane materials to provide long-lasting performance.
Installation requires lifting the car and using jack stands for safety, of course, and installation takes around 30 minutes and is accessible from underneath the car.
Kartboy Bushings are handmade in the USA.