Use this product to install LS3/LS7/LS9/L76 short injectors onto LS2 manifolds. This product also allows you to run 4.8L 5.3L 6.0L injectors in LS1 and LS2 manifolds. This product allows you to insert short injector 4.8 5.3 6.0 injectors into tall injector 4.8 5.3 6.0.