S&S, SuperStock exhaust valve, 1.575" diameter - 99-17 Twin Cam with S&S 79cc SuperStock heads; 84-99 Evo B.T. with S&S 76cc and 82cc SuperStock heads with flat top pistons (NU) 500576 Filler sleeves included to compensate

Filler sleeves included to compensate for the mentioned frame tube diameters

also referred to as a scratch pen

7 cm) long and with 1

In 1984 H4 was finally approved and introduced

To be used as a OEM style replacement item for use with internal throttle control and handlebar controlled ignition advance

S&S, SuperStock exhaust valve, 1.575" diameter - 99-17 Twin Cam with S&S 79cc SuperStock heads; 84-99 Evo B.T. with S&S 76cc and 82cc SuperStock heads with flat top pistons (NU) 500576 Filler sleeves included to compensateReplacement for S&S Twin Cam 531829 531830 531833 531834 79cc SuperStock heads and for S&S Evo B. T. 76cc & 82cc 512522 512523 531904 531905 531906 SuperStock heads.