yeah well if your lazy like me you just buy a 2 downpipe anything bigger you kinda gotta make it your self and well i am not the type to sit there and make a pipe for my car but i am not saying that it wouldnt work i am sure if you do it right man a 3 downpipe would be pretty damn cool but anyway even if you put a 2 downpipe and the CAT and the exhast and turn up the boost to 8 psi youll be at 251 horsepower.... pretty fast huh?