Audi 100 C4 2.3l, year 1991
 

Hi, i have a Audi 100 C4 2.3l, year 1991. How can I easily and cheap upgrade the engine, so i could get more hp? I have heard that they replace the fuel system from BMW and get 200 hp from this engine, have anybody heard about this or some other cheap way? :) sorry for my bad english :)