45MM CENTER TO CENTER AT HEAD 48MM CENTER TO CENTER AT CARB BOTH ENDS/OPENINGS MEASURE 22MM TURNS OUT TO THE LEFT SO CARB CLEARS FINS ON CYLINDER TBQ22KIT$28.95 *CARB INSOLATER FITS ALL CT110'S (ATC110'S_79/80) 48MM_C/C 22.5MM_CENTER (37H)THIS WORKS WITH OUR 300001.5 AND TBQ22KIT INTAKE MANIFOLD VERY WELL!! THIS GOES BETWEEN THE CARB AND INTAKE MANIFOLD AND IS FLAT ON BOTH SIDES. THIS FITS THE CT110 CARB JUST RIGHT!!!!!!! 37H$3.79 *CARB INSOLATOR GASKET CT90K2_TO_77 ALL_ATC90'S (37B)THIS GOES BETWEEN THE INTAKE MANIFOLD AND THE CARB INSOLATOR ON CT90'S K2 THRU 1977 TO USE THIS WITH OUR 37H INSOLATOR YOU WILL HAVE TO TRIM THE ID OUT SOME. 37B$2.29