This custom machined 1/4” aluminum tower/injector pod spacer raises the throttle body injector pod out of the bore area. By doing this it will increase more airflow into the the engine for more performance. This is the same aluminum spacer that is optional with our throttle body rebuild service. This piece will never wear out for the life of the throttle body. The stock throttle body screws will work just fine with these spacers and no additional gaskets are needed when installed with this item. A total of two spacers are required for two throttle bodies. There are two spacers per set which is all that is needed.