"Tech," is the short word for technical inspection. This inspection is made by other more experienced autocrossers to check the safety of your car. They check for a working seat belt, good return on throttle, brake pressure, a secure battery, tight lug nuts, play in suspension and bearings, interior free of lose items including floor mats, street tires must have measureable tread left and no cords showing. Any car in reasonable condition should pass a tech inspection no problem!