Have been runing with lid removed and baffell (spark arestor) removed WITHOUT fms and had no problems , why? ..tried it first didnt seem RIGHT, the only answer I could get from the pros was the bp 98 octane preminium unleaded from the servo. worked for me ...any else had this sucess

 

The standars ECU has a self learing mode for minor adjustment it will work with what you had done.
Even by going to the vortex you will not see that much of a gain you main increase will come from the exhaust system.