SPACER FOR THE CARB TO MANIFOLD END FOR THE MANIFOLDS NUMBERED 74T AND 69T . (O-RING NOT INCLUDED) CENTER TO CENTER BOLT PATTERN 48MM LARGE HOLE 20.5MM 4mm THICK NOT COUNTING O-RING This insulator will work perfectly on CT90's (1970_K2) thru 1979, don't forget the o ring it's sold separately (223H) see below WORKS FOR ALL ST90'S ALL CT110'S ATC90'S IF YOU NEED AN INSOLATOR THIS WILL WORK, BUT IT WILL BE ON THE CARB END, AND NOT THE HEAD END OF THE MANIFOLD This will also work for all stock TRX90s THE STOCK 1970 TO 1977 CT90 INSOLATOR 16211-077-306 IS DISCONTINUED, SO THIS IS WHAT WILL WORK. 300008 @ *INTAKE_MANIFOLD TO_HEAD_ORING 27MM_X_2MM 91305-KF0-003 1/20M CT110_S90 (R2102) THIS IS THE O-RING FOR THE BASE OF THE MANIFOLD. IT GOES BETWEEN THE MANIFOLD AND THE HEAD. WITH THESES MANIFOLDS THERE IS NO GASKET JUST THE O-RING BETWEEN THE HEAD AND THE MANIFOLD. IT FITS THE (78 TO 82 CT70'S AND CT90'S), ALL CT110'S AND ALL PASSPORTS. R2102