Harley Dyna 103 CI Twin Cam 103 Harley Motor Upgrades
S&S 124 Cold start. D&D Boarzilla, S&S 640 cam. You can take your Twin Cam 96 to a 110, it doesn't have to be a 103 to get the big inches. More torque comes with bigger inches S&S 124 Cold start. S&S 640 cam, S&S 58mm throttle body, 6.2 injectors, Thundermax tuner, D&D BOARZILLA exhaust. The dealers want you to think the Twin Cam 103 is a relic of the past now with the new Milwaukee 8 but it's really not that far off. ...