Several people had done air box & eliminated Cat to muffler modifications. I would like to know if there is any documented proof of performance aka rwhp & also if any ECU re-flashing was required.
attached is a video after I replaced the carburetor jets on my F3's. count the seconds between 70 mph & 145 mph. Remember I'm here to help:yes

r No t:shocked::shocked:.
Oh' look--I just saw a flock of flying pigs go by...:yikes::yikes: