The COBB 2013 Focus ST sport Spring Kit is the best first step to a better handling and better looking car. The 1î drop front and 1.1î drop rear lowers the cars center of gravity to improve cornering speed and response while also minimizing wheel gap for a sportier look. This aggressive stance reduces squat and wheel hop under hard acceleration. Progressive spring rates of 154 - 194 lbs/in front and 171 - 217 lbs/in rear provide the sport feel without being unnecessarily harsh or bouncy. Road course tested and real world approved, the COBB Tuning sport Spring Kit is the best direct replacement spring available for your 2013 Focus ST.