Cometic, EST top end gasket kit. Twin Cam 4-1/8" bore - 99-17 Twin Cam with 4-1/8" bore (excl. Twin Cooled) (NU) 917202 4-3/4" diameter

4-3/4" diameter

(1) Snap ring

* Maximum RPM

for OEM Touring & Chopped windshields)

Fits: > 67-70 XL(NU)

Cometic, EST top end gasket kit. Twin Cam 4-1/8" bore - 99-17 Twin Cam with 4-1/8" bore (excl. Twin Cooled) (NU) 917202 4-3/4" diameterWith MLS (Multi Layer Steel) . 030" thick head gaskets. The SLS (Single Layer Steel) cylinder base gaskets and SLS rocker cover gaskets used in these sets are . 020" thick and have . 001" of high temperature viton rubber coating on both sides. Kit comes with all gaskets, seals and o ring for a complete top end rebuild. Note: Kit comes with 99 04 style valve seals and 99 10 style breather gaskets.