Must have suspension tuning for your 18T/B/R/2. Gives your front hubs 6 degrees of castor which creates more stable low speed cornering. At high speeds these blocks reduce push as well. The increased low speed stability and better high speed front end grip translates into much improved lap times. If used on the stock RC18 or TEK18 suspension these blocks would give you effectively 12 degrees of castor which can be beneficial when running wide off road type tires on carpet tracks.
